521672 has 16 divisors (see below), whose sum is σ = 995100. Its totient is φ = 256320.

The previous prime is 521671. The next prime is 521693. The reversal of 521672 is 276125.

It can be written as a sum of positive squares in 2 ways, for example, as 470596 + 51076 = 686^2 + 226^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (521671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 1022.

2⁵²¹⁶⁷² is an apocalyptic number.

It is an amenable number.

521672 is a deficient number, since it is larger than the sum of its proper divisors (473428).

521672 is a wasteful number, since it uses less digits than its factorization.

521672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1132 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 521672 is about 722.2686480805. The cubic root of 521672 is about 80.5006108257.

Adding to 521672 its reverse (276125), we get a palindrome (797797).

The spelling of 521672 in words is "five hundred twenty-one thousand, six hundred seventy-two".