402975 has 30 divisors (see below), whose sum is σ = 750200. Its totient is φ = 213840.

The previous prime is 402949. The next prime is 402991. The reversal of 402975 is 579204.

It is not a de Polignac number, because 402975 - 2⁵ = 402943 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1926 + ... + 2124.

2⁴⁰²⁹⁷⁵ is an apocalyptic number.

402975 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

402975 is a deficient number, since it is larger than the sum of its proper divisors (347225).

402975 is a wasteful number, since it uses less digits than its factorization.

402975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 402975 is about 634.8031190850. The cubic root of 402975 is about 73.8628455357.

The spelling of 402975 in words is "four hundred two thousand, nine hundred seventy-five".