63120520 has 32 divisors (see below), whose sum is σ = 145863000. Its totient is φ = 24565248.

The previous prime is 63120511. The next prime is 63120523. The reversal of 63120520 is 2502136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61121124 + 1999396 = 7818^2 + 1414^2 .

It is not an unprimeable number, because it can be changed into a prime (63120523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19845 + ... + 22804.

Almost surely, 2^63120520 is an apocalyptic number.

It is an amenable number.

63120520 is an abundant number, since it is smaller than the sum of its proper divisors (82742480).

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

63120520 is a wasteful number, since it uses less digits than its factorization.

63120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42697 (or 42693 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 63120520 is about 7944.8423521175. The cubic root of 63120520 is about 398.1592924827.

Adding to 63120520 its reverse (2502136), we get a palindrome (65622656).

The spelling of 63120520 in words is "sixty-three million, one hundred twenty thousand, five hundred twenty".