321604625 has 16 divisors (see below), whose sum is σ = 405275520. Its totient is φ = 254775600.

The previous prime is 321604537. The next prime is 321604631. The reversal of 321604625 is 526406123.

It is not a de Polignac number, because 321604625 - 2¹⁸ = 321342481 is a prime.

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, 386 + ... + 25364.

It is an arithmetic number, because the mean of its divisors is an integer number (25329720).

Almost surely, 2^321604625 is an apocalyptic number.

It is an amenable number.

321604625 is a deficient number, since it is larger than the sum of its proper divisors (83670895).

321604625 is a wasteful number, since it uses less digits than its factorization.

321604625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25097 (or 25087 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 321604625 is about 17933.3383674095. The cubic root of 321604625 is about 685.1317522338.

The spelling of 321604625 in words is "three hundred twenty-one million, six hundred four thousand, six hundred twenty-five".