123501513 has 16 divisors (see below), whose sum is σ = 172118016. Its totient is φ = 78621840.

The previous prime is 123501509. The next prime is 123501529. The reversal of 123501513 is 315105321.

It is not a de Polignac number, because 123501513 - 2² = 123501509 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123501513.

It is not an unprimeable number, because it can be changed into a prime (123501503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54856 + ... + 57062.

It is an arithmetic number, because the mean of its divisors is an integer number (10757376).

Almost surely, 2^123501513 is an apocalyptic number.

It is an amenable number.

123501513 is a deficient number, since it is larger than the sum of its proper divisors (48616503).

123501513 is a wasteful number, since it uses less digits than its factorization.

123501513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 123501513 is about 11113.1234583262. The cubic root of 123501513 is about 497.9939798630.

Adding to 123501513 its reverse (315105321), we get a palindrome (438606834).

The spelling of 123501513 in words is "one hundred twenty-three million, five hundred one thousand, five hundred thirteen".