12977155 has 8 divisors (see below), whose sum is σ = 15678000. Its totient is φ = 10311456.

The previous prime is 12977147. The next prime is 12977177. The reversal of 12977155 is 55177921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12977155 - 2³ = 12977147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7965 + ... + 9454.

It is an arithmetic number, because the mean of its divisors is an integer number (1959750).

Almost surely, 2^12977155 is an apocalyptic number.

12977155 is a deficient number, since it is larger than the sum of its proper divisors (2700845).

12977155 is a wasteful number, since it uses less digits than its factorization.

12977155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17573.

The product of its digits is 22050, while the sum is 37.

The square root of 12977155 is about 3602.3818509425. The cubic root of 12977155 is about 234.9956540618.

It can be divided in two parts, 129 and 77155, that added together give a square (77284 = 278²).

The spelling of 12977155 in words is "twelve million, nine hundred seventy-seven thousand, one hundred fifty-five".