402551125 has 8 divisors (see below), whose sum is σ = 502383960. Its totient is φ = 322040800.

The previous prime is 402551111. The next prime is 402551167. The reversal of 402551125 is 521155204.

It can be written as a sum of positive squares in 4 ways, for example, as 25492401 + 377058724 = 5049^2 + 19418^2 .

It is not a de Polignac number, because 402551125 - 2⁹ = 402550613 is a prime.

It is a hoax number, since the sum of its digits (25) 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 (25).

It is a self number, because there is not a number n which added to its sum of digits gives 402551125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1610080 + ... + 1610329.

It is an arithmetic number, because the mean of its divisors is an integer number (62797995).

Almost surely, 2^402551125 is an apocalyptic number.

It is an amenable number.

402551125 is a deficient number, since it is larger than the sum of its proper divisors (99832835).

402551125 is an equidigital number, since it uses as much as digits as its factorization.

402551125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220424 (or 3220414 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 402551125 is about 20063.6767567662. The cubic root of 402551125 is about 738.3693855429.

The spelling of 402551125 in words is "four hundred two million, five hundred fifty-one thousand, one hundred twenty-five".