641925 has 30 divisors (see below), whose sum is σ = 1192818. Its totient is φ = 341280.

The previous prime is 641923. The next prime is 641929. The reversal of 641925 is 529146.

641925 = T₂₁₄ + T₂₁₅ + ... + T₂₃₈.

641925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 324 + 641601 = 18^2 + 801^2 .

It is not a de Polignac number, because 641925 - 2¹ = 641923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641923) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1867 + ... + 2183.

2⁶⁴¹⁹²⁵ is an apocalyptic number.

It is an amenable number.

641925 is a deficient number, since it is larger than the sum of its proper divisors (550893).

641925 is a wasteful number, since it uses less digits than its factorization.

641925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 325 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 641925 is about 801.2022216644. The cubic root of 641925 is about 86.2637029268.

The spelling of 641925 in words is "six hundred forty-one thousand, nine hundred twenty-five".