12520515 has 16 divisors (see below), whose sum is σ = 22894848. Its totient is φ = 5723616.

The previous prime is 12520511. The next prime is 12520531. The reversal of 12520515 is 51502521.

12520515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12520515 - 2² = 12520511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12520491 and 12520500.

It is not an unprimeable number, because it can be changed into a prime (12520511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59517 + ... + 59726.

It is an arithmetic number, because the mean of its divisors is an integer number (1430928).

Almost surely, 2^12520515 is an apocalyptic number.

12520515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12520515 is a deficient number, since it is larger than the sum of its proper divisors (10374333).

12520515 is a wasteful number, since it uses less digits than its factorization.

12520515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119258.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12520515 is about 3538.4339756452. The cubic root of 12520515 is about 232.2063352133.

The spelling of 12520515 in words is "twelve million, five hundred twenty thousand, five hundred fifteen".