12877945 has 4 divisors (see below), whose sum is σ = 15453540. Its totient is φ = 10302352.

The previous prime is 12877897. The next prime is 12877951. The reversal of 12877945 is 54977821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54977821 = 4159 ⋅13219.

It can be written as a sum of positive squares in 2 ways, for example, as 7458361 + 5419584 = 2731^2 + 2328^2 .

It is a cyclic number.

It is not a de Polignac number, because 12877945 - 2⁹ = 12877433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287790 + ... + 1287799.

It is an arithmetic number, because the mean of its divisors is an integer number (3863385).

Almost surely, 2^12877945 is an apocalyptic number.

It is an amenable number.

12877945 is a deficient number, since it is larger than the sum of its proper divisors (2575595).

12877945 is an equidigital number, since it uses as much as digits as its factorization.

12877945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575594.

The product of its digits is 141120, while the sum is 43.

The square root of 12877945 is about 3588.5853758828. The cubic root of 12877945 is about 234.3952763495.

The spelling of 12877945 in words is "twelve million, eight hundred seventy-seven thousand, nine hundred forty-five".