521120252 has 6 divisors (see below), whose sum is σ = 911960448. Its totient is φ = 260560124.

The previous prime is 521120251. The next prime is 521120279. The reversal of 521120252 is 252021125.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521120251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65140028 + ... + 65140035.

It is an arithmetic number, because the mean of its divisors is an integer number (151993408).

Almost surely, 2^521120252 is an apocalyptic number.

It is an amenable number.

521120252 is a deficient number, since it is larger than the sum of its proper divisors (390840196).

521120252 is a wasteful number, since it uses less digits than its factorization.

521120252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130280067 (or 130280065 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 521120252 is about 22828.0584369324. The cubic root of 521120252 is about 804.7222024111.

Adding to 521120252 its reverse (252021125), we get a palindrome (773141377).

The spelling of 521120252 in words is "five hundred twenty-one million, one hundred twenty thousand, two hundred fifty-two".