641532 has 24 divisors (see below), whose sum is σ = 1510096. Its totient is φ = 211968.

The previous prime is 641521. The next prime is 641549. The reversal of 641532 is 235146.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 641499 and 641508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2178 + ... + 2454.

2⁶⁴¹⁵³² is an apocalyptic number.

It is an amenable number.

641532 is an abundant number, since it is smaller than the sum of its proper divisors (868564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641532 is a wasteful number, since it uses less digits than its factorization.

641532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 475 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 641532 is about 800.9569276809. The cubic root of 641532 is about 86.2460951813.

Adding to 641532 its reverse (235146), we get a palindrome (876678).

It can be divided in two parts, 64 and 1532, that added together give a triangular number (1596 = T₅₆).

The spelling of 641532 in words is "six hundred forty-one thousand, five hundred thirty-two".