525721252 has 12 divisors (see below), whose sum is σ = 1051442560. Its totient is φ = 225309096.

The previous prime is 525721249. The next prime is 525721283. The reversal of 525721252 is 252127525.

525721252 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9387852 + ... + 9387907.

Almost surely, 2^525721252 is an apocalyptic number.

It is an amenable number.

525721252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

525721252 is a wasteful number, since it uses less digits than its factorization.

525721252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18775770 (or 18775768 counting only the distinct ones).

The product of its digits is 14000, while the sum is 31.

The square root of 525721252 is about 22928.6120818509. The cubic root of 525721252 is about 807.0835789320.

Adding to 525721252 its reverse (252127525), we get a palindrome (777848777).

It can be divided in two parts, 52572 and 1252, that added together give a square (53824 = 232²).

The spelling of 525721252 in words is "five hundred twenty-five million, seven hundred twenty-one thousand, two hundred fifty-two".