12878621 has 8 divisors (see below), whose sum is σ = 15019200. Its totient is φ = 11038524.

The previous prime is 12878603. The next prime is 12878669. The reversal of 12878621 is 12687821.

It is not a de Polignac number, because 12878621 - 2¹⁴ = 12862237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18431 + ... + 19116.

It is an arithmetic number, because the mean of its divisors is an integer number (1877400).

Almost surely, 2^12878621 is an apocalyptic number.

It is an amenable number.

12878621 is a deficient number, since it is larger than the sum of its proper divisors (2140579).

12878621 is an frugal number, since it uses more digits than its factorization.

12878621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37568 (or 37554 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 12878621 is about 3588.6795621788. The cubic root of 12878621 is about 234.3993776362.

The spelling of 12878621 in words is "twelve million, eight hundred seventy-eight thousand, six hundred twenty-one".