122520513 has 16 divisors (see below), whose sum is σ = 175810176. Its totient is φ = 75613440.

The previous prime is 122520509. The next prime is 122520599. The reversal of 122520513 is 315025221.

It is not a de Polignac number, because 122520513 - 2² = 122520509 is a prime.

It is a super-2 number, since 2×122520513² = 30022552211566338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122520513.

It is not an unprimeable number, because it can be changed into a prime (122520413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16581 + ... + 22802.

It is an arithmetic number, because the mean of its divisors is an integer number (10988136).

Almost surely, 2^122520513 is an apocalyptic number.

It is an amenable number.

122520513 is a deficient number, since it is larger than the sum of its proper divisors (53289663).

122520513 is a wasteful number, since it uses less digits than its factorization.

122520513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 122520513 is about 11068.8984546792. The cubic root of 122520513 is about 496.6719141726.

Adding to 122520513 its reverse (315025221), we get a palindrome (437545734).

The spelling of 122520513 in words is "one hundred twenty-two million, five hundred twenty thousand, five hundred thirteen".