641625 has 32 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 324800.

The previous prime is 641623. The next prime is 641633. The reversal of 641625 is 526146.

641625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641625 - 2¹ = 641623 is a prime.

Its product of digits (1440) is a multiple of the sum of its prime divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 641595 and 641604.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641625.

It is not an unprimeable number, because it can be changed into a prime (641623) 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, 10846 + ... + 10904.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2⁶⁴¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

641625 is a deficient number, since it is larger than the sum of its proper divisors (481575).

641625 is a wasteful number, since it uses less digits than its factorization.

641625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 96 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 641625 is about 801.0149811333. The cubic root of 641625 is about 86.2502625491.

Subtracting from 641625 its sum of digits (24), we obtain a square (641601 = 801²).

It can be divided in two parts, 6416 and 25, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 641625 in words is "six hundred forty-one thousand, six hundred twenty-five".