16624925 has 6 divisors (see below), whose sum is σ = 20614938. Its totient is φ = 13299920.

The previous prime is 16624919. The next prime is 16624939. The reversal of 16624925 is 52942661.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5044516 + 11580409 = 2246^2 + 3403^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16624925 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332474 + ... + 332523.

It is an arithmetic number, because the mean of its divisors is an integer number (3435823).

Almost surely, 2^16624925 is an apocalyptic number.

It is an amenable number.

16624925 is a deficient number, since it is larger than the sum of its proper divisors (3990013).

16624925 is an equidigital number, since it uses as much as digits as its factorization.

16624925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665007 (or 665002 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 16624925 is about 4077.3674104746. The cubic root of 16624925 is about 255.2230523049.

The spelling of 16624925 in words is "sixteen million, six hundred twenty-four thousand, nine hundred twenty-five".