12775515 has 32 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 6416256.

The previous prime is 12775489. The next prime is 12775519. The reversal of 12775515 is 51557721.

12775515 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 12775515 - 2⁹ = 12775003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12775519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18364 + ... + 19046.

It is an arithmetic number, because the mean of its divisors is an integer number (677160).

Almost surely, 2^12775515 is an apocalyptic number.

12775515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12775515 is a deficient number, since it is larger than the sum of its proper divisors (8893605).

12775515 is a wasteful number, since it uses less digits than its factorization.

12775515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its digits is 12250, while the sum is 33.

The square root of 12775515 is about 3574.2852432340. The cubic root of 12775515 is about 233.7721684867.

The spelling of 12775515 in words is "twelve million, seven hundred seventy-five thousand, five hundred fifteen".