12878477 has 4 divisors (see below), whose sum is σ = 13059936. Its totient is φ = 12697020.

The previous prime is 12878431. The next prime is 12878483. The reversal of 12878477 is 77487821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12878477 - 2²² = 8684173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90623 + ... + 90764.

It is an arithmetic number, because the mean of its divisors is an integer number (3264984).

Almost surely, 2^12878477 is an apocalyptic number.

It is an amenable number.

12878477 is a deficient number, since it is larger than the sum of its proper divisors (181459).

12878477 is an equidigital number, since it uses as much as digits as its factorization.

12878477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181458.

The product of its digits is 175616, while the sum is 44.

The square root of 12878477 is about 3588.6594990330. The cubic root of 12878477 is about 234.3985040014.

The spelling of 12878477 in words is "twelve million, eight hundred seventy-eight thousand, four hundred seventy-seven".