521240132 has 12 divisors (see below), whose sum is σ = 1042480320. Its totient is φ = 223388616.

The previous prime is 521240087. The next prime is 521240141. The reversal of 521240132 is 231042125.

521240132 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, 9307832 + ... + 9307887.

It is an arithmetic number, because the mean of its divisors is an integer number (86873360).

Almost surely, 2^521240132 is an apocalyptic number.

It is an amenable number.

521240132 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.

521240132 is a wasteful number, since it uses less digits than its factorization.

521240132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18615730 (or 18615728 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 521240132 is about 22830.6840020180. The cubic root of 521240132 is about 804.7839045491.

Adding to 521240132 its reverse (231042125), we get a palindrome (752282257).

The spelling of 521240132 in words is "five hundred twenty-one million, two hundred forty thousand, one hundred thirty-two".