12015913 has 16 divisors (see below), whose sum is σ = 15434496. Its totient is φ = 9092160.

The previous prime is 12015907. The next prime is 12015917. The reversal of 12015913 is 31951021.

It is a de Polignac number, because none of the positive numbers 2^k-12015913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12015917) 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, 778 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (964656).

Almost surely, 2^12015913 is an apocalyptic number.

12015913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12015913 is a deficient number, since it is larger than the sum of its proper divisors (3418583).

12015913 is a wasteful number, since it uses less digits than its factorization.

12015913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5784.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 12015913 is about 3466.3976978991. The cubic root of 12015913 is about 229.0440029093.

Adding to 12015913 its reverse (31951021), we get a palindrome (43966934).

The spelling of 12015913 in words is "twelve million, fifteen thousand, nine hundred thirteen".