19765625 has 32 divisors (see below), whose sum is σ = 28124928. Its totient is φ = 13750000.

The previous prime is 19765609. The next prime is 19765633. The reversal of 19765625 is 52656791.

It is not a de Polignac number, because 19765625 - 2⁴ = 19765609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 859364 + ... + 859386.

It is an arithmetic number, because the mean of its divisors is an integer number (878904).

Almost surely, 2^19765625 is an apocalyptic number.

It is an amenable number.

19765625 is a deficient number, since it is larger than the sum of its proper divisors (8359303).

19765625 is an frugal number, since it uses more digits than its factorization.

19765625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 39 counting only the distinct ones).

The product of its digits is 113400, while the sum is 41.

The square root of 19765625 is about 4445.8548109447. The cubic root of 19765625 is about 270.3772732276.

The spelling of 19765625 in words is "nineteen million, seven hundred sixty-five thousand, six hundred twenty-five".