625625 has 40 divisors (see below), whose sum is σ = 1049664. Its totient is φ = 360000.

The previous prime is 625621. The next prime is 625627. The reversal of 625625 is 526526.

It is a happy number.

It is not a de Polignac number, because 625625 - 2² = 625621 is a prime.

It is an Ulam number.

Its product of digits (3600) is a multiple of the sum of its prime divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 625594 and 625603.

It is not an unprimeable number, because it can be changed into a prime (625621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 48119 + ... + 48131.

2⁶²⁵⁶²⁵ is an apocalyptic number.

625625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

625625 is a deficient number, since it is larger than the sum of its proper divisors (424039).

625625 is a wasteful number, since it uses less digits than its factorization.

625625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 36 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 625625 is about 790.9646009778. The cubic root of 625625 is about 85.5272874384.

Subtracting from 625625 its reverse (526526), we obtain a palindrome (99099).

The spelling of 625625 in words is "six hundred twenty-five thousand, six hundred twenty-five".