12949815 has 16 divisors (see below), whose sum is σ = 21280608. Its totient is φ = 6719616.

The previous prime is 12949813. The next prime is 12949829. The reversal of 12949815 is 51894921.

It is not a de Polignac number, because 12949815 - 2¹ = 12949813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12949813) 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, 11112 + ... + 12221.

It is an arithmetic number, because the mean of its divisors is an integer number (1330038).

Almost surely, 2^12949815 is an apocalyptic number.

12949815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12949815 is a deficient number, since it is larger than the sum of its proper divisors (8330793).

12949815 is a wasteful number, since it uses less digits than its factorization.

12949815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23378.

The product of its digits is 25920, while the sum is 39.

The square root of 12949815 is about 3598.5851386343. The cubic root of 12949815 is about 234.8305100495.

The spelling of 12949815 in words is "twelve million, nine hundred forty-nine thousand, eight hundred fifteen".