521772 has 12 divisors (see below), whose sum is σ = 1217496. Its totient is φ = 173920.

The previous prime is 521767. The next prime is 521777. The reversal of 521772 is 277125.

It is an interprime number because it is at equal distance from previous prime (521767) and next prime (521777).

It is a tau number, because it is divible by the number of its divisors (12).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521772.

It is not an unprimeable number, because it can be changed into a prime (521777) 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, 21729 + ... + 21752.

It is an arithmetic number, because the mean of its divisors is an integer number (101458).

2⁵²¹⁷⁷² is an apocalyptic number.

It is an amenable number.

521772 is an abundant number, since it is smaller than the sum of its proper divisors (695724).

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

521772 is a wasteful number, since it uses less digits than its factorization.

521772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43488 (or 43486 counting only the distinct ones).

The product of its digits is 980, while the sum is 24.

The square root of 521772 is about 722.3378710825. The cubic root of 521772 is about 80.5057542535.

Adding to 521772 its reverse (277125), we get a palindrome (798897).

The spelling of 521772 in words is "five hundred twenty-one thousand, seven hundred seventy-two".