402565135 has 12 divisors (see below), whose sum is σ = 561948408. Its totient is φ = 276044496.

The previous prime is 402565127. The next prime is 402565213. The reversal of 402565135 is 531565204.

It is not a de Polignac number, because 402565135 - 2³ = 402565127 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 402565097 and 402565106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821317 + ... + 821806.

It is an arithmetic number, because the mean of its divisors is an integer number (46829034).

Almost surely, 2^402565135 is an apocalyptic number.

402565135 is a deficient number, since it is larger than the sum of its proper divisors (159383273).

402565135 is a wasteful number, since it uses less digits than its factorization.

402565135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643142 (or 1643135 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 402565135 is about 20064.0258921284. The cubic root of 402565135 is about 738.3779512748.

The spelling of 402565135 in words is "four hundred two million, five hundred sixty-five thousand, one hundred thirty-five".