12977455 has 4 divisors (see below), whose sum is σ = 15572952. Its totient is φ = 10381960.

The previous prime is 12977449. The next prime is 12977467. The reversal of 12977455 is 55477921.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-12977455 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297741 + ... + 1297750.

It is an arithmetic number, because the mean of its divisors is an integer number (3893238).

Almost surely, 2^12977455 is an apocalyptic number.

12977455 is a deficient number, since it is larger than the sum of its proper divisors (2595497).

12977455 is an equidigital number, since it uses as much as digits as its factorization.

12977455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595496.

The product of its digits is 88200, while the sum is 40.

The square root of 12977455 is about 3602.4234898190. The cubic root of 12977455 is about 234.9974648889.

The spelling of 12977455 in words is "twelve million, nine hundred seventy-seven thousand, four hundred fifty-five".