12651815 has 16 divisors (see below), whose sum is σ = 17435520. Its totient is φ = 8716320.

The previous prime is 12651809. The next prime is 12651833. The reversal of 12651815 is 51815621.

It is not a de Polignac number, because 12651815 - 2⁸ = 12651559 is a prime.

12651815 is a modest number, since divided by 1815 gives 1265 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5009 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (1089720).

Almost surely, 2^12651815 is an apocalyptic number.

12651815 is a deficient number, since it is larger than the sum of its proper divisors (4783705).

12651815 is a wasteful number, since it uses less digits than its factorization.

12651815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142.

The product of its digits is 2400, while the sum is 29.

The square root of 12651815 is about 3556.9389930107. The cubic root of 12651815 is about 233.0152138752.

The spelling of 12651815 in words is "twelve million, six hundred fifty-one thousand, eight hundred fifteen".