402015257 has 12 divisors (see below), whose sum is σ = 469760256. Its totient is φ = 343029960.

The previous prime is 402015247. The next prime is 402015287. The reversal of 402015257 is 752510204.

It is not a de Polignac number, because 402015257 - 2¹⁰ = 402014233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402015227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7469 + ... + 29322.

It is an arithmetic number, because the mean of its divisors is an integer number (39146688).

Almost surely, 2^402015257 is an apocalyptic number.

It is an amenable number.

402015257 is a deficient number, since it is larger than the sum of its proper divisors (67744999).

402015257 is a wasteful number, since it uses less digits than its factorization.

402015257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37028 (or 37021 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 402015257 is about 20050.3181271520. The cubic root of 402015257 is about 738.0416058731.

The spelling of 402015257 in words is "four hundred two million, fifteen thousand, two hundred fifty-seven".