625646 has 32 divisors (see below), whose sum is σ = 1175040. Its totient is φ = 243936.

The previous prime is 625643. The next prime is 625657. The reversal of 625646 is 646526.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625646.

It is not an unprimeable number, because it can be changed into a prime (625643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9305 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2⁶²⁵⁶⁴⁶ is an apocalyptic number.

625646 is a deficient number, since it is larger than the sum of its proper divisors (549394).

625646 is a wasteful number, since it uses less digits than its factorization.

625646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128.

The product of its digits is 8640, while the sum is 29.

The square root of 625646 is about 790.9778757968. The cubic root of 625646 is about 85.5282443763.

It can be divided in two parts, 6 and 25646, that added together give a palindrome (25652).

The spelling of 625646 in words is "six hundred twenty-five thousand, six hundred forty-six".