4000 (number)

Cardinal	Four thousand
Ordinal	Four thousandth
Factorization
Binary	111110100000
Hexadecimal	FA0

Selected numbers in the range 4001-4999

4005 - triangular number -
;4007 - safe prime

4010 - magic constant of n×n magic square and n-Queens Problem for n = 20. -
;4011 - PLU code for yellow bananas

4019 - Sophie Germain prime -
;4028 - sum of the first 45 primes

4030 - 3rd weird number -
;4031 - sum of the cubes of the first six primes

4033 - 6th super-Poulet number -
;4060 - tetrahedral number

4073 - Sophie Germain prime -
;4079 - safe prime

4095 - triangular number -
;4096 - 12th power of two, 16th cube, 64^2

4104 = 2^3 + 16^3 = 9^3 + 15^3 -
;4127 - safe prime

4139 - safe prime -
;4166 - centered heptagonal number

4181 - Fibonacci number -
;4186 - triangular number

4200 - nonagonal number, pentagonal pyramidal number -
;4210 - 11th semi-meandric number

4211 - Sophie Germain prime -
;4219 - cuban prime of the form x = y + 1

4225 = 65^2, centered octagonal number -
;4227 - sum of the first 46 primes

4257 - decagonal number -
;4259 - safe prime

4271 - Sophie Germain prime -
;4278 - triangular number

4283 - safe prime -
;4324 - 23rd square pyramidal number

4349 - Sophie Germain prime -
;4356 - sum of the cubes of the first eleven integers, 66^2

4369 - 7th super-Poulet number -
;4371 - triangular number

4373 - Sophie Germain prime -
;4391 - Sophie Germain prime

4400 - the number of missing persons in the sci-fi show The 4400 -
;4409 - Sophie Germain prime

4411 - centered heptagonal number -
;4438 - sum of the first 47 primes

4446 - nonagonal number -
;4447 - cuban prime of the form x = y + 1

4465 - triangular number -
;4481 - Sophie Germain prime

4489 = 67^2, centered octagonal number -
;4495 - tetrahedral number

4503 - largest number not the sum of four or fewer squares of composites -
;4505 - 5th Zeisel number

4522 - decagonal number -
;4547 - safe prime

4560 - triangular number -
;4579 - octahedral number

4607 - Woodall number -
;4624 = 68^2

4641 - magic constant of n×n magic square and n-Queens Problem for n = 21. -
;4656 - triangular number

4661 - sum of the first 48 primes -
;4663 - centered heptagonal number

4679 - safe prime -
;4681 - 8th super-Poulet number

4699 - nonagonal number -
;4703 - safe prime

4705 = 48² + 49² = 17² + 18² + ... 26² -
;4727 - sum of the squares of the first twelve primes

4733 - Sophie Germain prime -
;4753 - triangular number

4761 = 69^2, centered octagonal number -
;4787 - safe prime

4788 - 14th Keith number -
;4793 - Sophie Germain prime

4795 - decagonal number -
;4799 - safe prime

4801 - cuban prime of the form x = y + 2 -
;4851 - triangular number, pentagonal pyramidal number

4871 - Sophie Germain prime -
;4879 - 11th Kaprekar number

4888 - sum of the first 49 primes -
;4900 - the only square-pyramidal square other than 1[1], 70^2

4913 - 17th cube -
;4919 - Sophie Germain prime, safe prime

4922 - centered heptagonal number -
;4941 - centered cube number

4943 - Sophie Germain prime -
;4950 - triangular number, 12th Kaprekar number

4959 - nonagonal number -
;4960 - tetrahedral number; greater of 4th pair of Smith brothers