405634625 has 16 divisors (see below), whose sum is σ = 552254976. Its totient is φ = 295006000.

The previous prime is 405634613. The next prime is 405634633. The reversal of 405634625 is 526436504.

It is a happy number.

It is not a de Polignac number, because 405634625 - 2⁶ = 405634561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146129 + ... + 148878.

It is an arithmetic number, because the mean of its divisors is an integer number (34515936).

Almost surely, 2^405634625 is an apocalyptic number.

It is an amenable number.

405634625 is a deficient number, since it is larger than the sum of its proper divisors (146620351).

405634625 is a wasteful number, since it uses less digits than its factorization.

405634625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295033 (or 295023 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 405634625 is about 20140.3730104484. The cubic root of 405634625 is about 740.2498699651.

The spelling of 405634625 in words is "four hundred five million, six hundred thirty-four thousand, six hundred twenty-five".