12505115 has 16 divisors (see below), whose sum is σ = 18159552. Its totient is φ = 8070144.

The previous prime is 12505111. The next prime is 12505117. The reversal of 12505115 is 51150521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12505115 - 2² = 12505111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12505111) 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, 9914 + ... + 11103.

It is an arithmetic number, because the mean of its divisors is an integer number (1134972).

Almost surely, 2^12505115 is an apocalyptic number.

12505115 is a deficient number, since it is larger than the sum of its proper divisors (5654437).

12505115 is a wasteful number, since it uses less digits than its factorization.

12505115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21046.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 12505115 is about 3536.2572021843. The cubic root of 12505115 is about 232.1110929996. Note that the first 3 decimals are identical.

Adding to 12505115 its reverse (51150521), we get a palindrome (63655636).

The spelling of 12505115 in words is "twelve million, five hundred five thousand, one hundred fifteen".