12515955 has 16 divisors (see below), whose sum is σ = 20152320. Its totient is φ = 6632928.

The previous prime is 12515941. The next prime is 12515957. The reversal of 12515955 is 55951521.

It is not a de Polignac number, because 12515955 - 2⁷ = 12515827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12515957) 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, 115 + ... + 5004.

It is an arithmetic number, because the mean of its divisors is an integer number (1259520).

Almost surely, 2^12515955 is an apocalyptic number.

12515955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12515955 is a deficient number, since it is larger than the sum of its proper divisors (7636365).

12515955 is a wasteful number, since it uses less digits than its factorization.

12515955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290.

The product of its digits is 11250, while the sum is 33.

The square root of 12515955 is about 3537.7895641205. The cubic root of 12515955 is about 232.1781417654.

The spelling of 12515955 in words is "twelve million, five hundred fifteen thousand, nine hundred fifty-five".