641525 has 12 divisors (see below), whose sum is σ = 809472. Its totient is φ = 504240.

The previous prime is 641521. The next prime is 641549. The reversal of 641525 is 525146.

It is not a de Polignac number, because 641525 - 2² = 641521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1484 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (67456).

2⁶⁴¹⁵²⁵ is an apocalyptic number.

It is an amenable number.

641525 is a deficient number, since it is larger than the sum of its proper divisors (167947).

641525 is a wasteful number, since it uses less digits than its factorization.

641525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 455 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 641525 is about 800.9525578959. The cubic root of 641525 is about 86.2457814922.

The spelling of 641525 in words is "six hundred forty-one thousand, five hundred twenty-five".