16865625 has 48 divisors (see below), whose sum is σ = 32247936. Its totient is φ = 7680000.

The previous prime is 16865623. The next prime is 16865633. The reversal of 16865625 is 52656861.

It is not a de Polignac number, because 16865625 - 2¹ = 16865623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16865623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65497 + ... + 65753.

It is an arithmetic number, because the mean of its divisors is an integer number (671832).

Almost surely, 2^16865625 is an apocalyptic number.

16865625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16865625 is a deficient number, since it is larger than the sum of its proper divisors (15382311).

16865625 is an frugal number, since it uses more digits than its factorization.

16865625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 272 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 16865625 is about 4106.7779340987. Note that the first 3 decimals coincide. The cubic root of 16865625 is about 256.4488838708.

The spelling of 16865625 in words is "sixteen million, eight hundred sixty-five thousand, six hundred twenty-five".