8391625 has 32 divisors (see below), whose sum is σ = 12130560. Its totient is φ = 5728000.

The previous prime is 8391623. The next prime is 8391641. The reversal of 8391625 is 5261938.

It is not a de Polignac number, because 8391625 - 2¹ = 8391623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23196 + ... + 23554.

It is an arithmetic number, because the mean of its divisors is an integer number (379080).

Almost surely, 2^8391625 is an apocalyptic number.

8391625 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8391625 is a deficient number, since it is larger than the sum of its proper divisors (3738935).

8391625 is a wasteful number, since it uses less digits than its factorization.

8391625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 392 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 8391625 is about 2896.8301641622. The cubic root of 8391625 is about 203.2116908070.

The spelling of 8391625 in words is "eight million, three hundred ninety-one thousand, six hundred twenty-five".