12878845 has 16 divisors (see below), whose sum is σ = 17751168. Its totient is φ = 8786880.

The previous prime is 12878839. The next prime is 12878851. The reversal of 12878845 is 54887821.

12878845 = 116² + 117² + ... + 342².

It is an interprime number because it is at equal distance from previous prime (12878839) and next prime (12878851).

It is not a de Polignac number, because 12878845 - 2¹³ = 12870653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 7135 + ... + 8755.

It is an arithmetic number, because the mean of its divisors is an integer number (1109448).

Almost surely, 2^12878845 is an apocalyptic number.

12878845 is the 2270-th heptagonal number.

It is an amenable number.

12878845 is a deficient number, since it is larger than the sum of its proper divisors (4872323).

12878845 is a wasteful number, since it uses less digits than its factorization.

12878845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860.

The product of its digits is 143360, while the sum is 43.

The square root of 12878845 is about 3588.7107712938. The cubic root of 12878845 is about 234.4007366108.

The spelling of 12878845 in words is "twelve million, eight hundred seventy-eight thousand, eight hundred forty-five".