401890625 has 42 divisors (see below), whose sum is σ = 539641530. Its totient is φ = 299200000.

The previous prime is 401890597. The next prime is 401890637. The reversal of 401890625 is 526098104.

It can be written as a sum of positive squares in 21 ways, for example, as 239506576 + 162384049 = 15476^2 + 12743^2 .

It is not a de Polignac number, because 401890625 - 2¹⁶ = 401825089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 4515581 + ... + 4515669.

Almost surely, 2^401890625 is an apocalyptic number.

It is an amenable number.

401890625 is a deficient number, since it is larger than the sum of its proper divisors (137750905).

401890625 is an frugal number, since it uses more digits than its factorization.

401890625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 401890625 is about 20047.2099056203. The cubic root of 401890625 is about 737.9653292418.

The spelling of 401890625 in words is "four hundred one million, eight hundred ninety thousand, six hundred twenty-five".