16860625 has 20 divisors (see below), whose sum is σ = 21508740. Its totient is φ = 13208000.

The previous prime is 16860611. The next prime is 16860643. The reversal of 16860625 is 52606861.

16860625 = 2903² + 2904².

It can be written as a sum of positive squares in 10 ways, for example, as 8433216 + 8427409 = 2904^2 + 2903^2 .

It is not a de Polignac number, because 16860625 - 2⁵ = 16860593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32871 + ... + 33379.

It is an arithmetic number, because the mean of its divisors is an integer number (1075437).

Almost surely, 2^16860625 is an apocalyptic number.

16860625 is the 2904-th centered square number.

It is an amenable number.

16860625 is a deficient number, since it is larger than the sum of its proper divisors (4648115).

16860625 is an frugal number, since it uses more digits than its factorization.

16860625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 16860625 is about 4106.1691392343. The cubic root of 16860625 is about 256.4235390021.

The spelling of 16860625 in words is "sixteen million, eight hundred sixty thousand, six hundred twenty-five".