12972855 has 16 divisors (see below), whose sum is σ = 23721984. Its totient is φ = 5930400.

The previous prime is 12972833. The next prime is 12972871. The reversal of 12972855 is 55827921.

It is not a de Polignac number, because 12972855 - 2¹⁰ = 12971831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61671 + ... + 61880.

It is an arithmetic number, because the mean of its divisors is an integer number (1482624).

Almost surely, 2^12972855 is an apocalyptic number.

12972855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12972855 is a deficient number, since it is larger than the sum of its proper divisors (10749129).

12972855 is a wasteful number, since it uses less digits than its factorization.

12972855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123566.

The product of its digits is 50400, while the sum is 39.

The square root of 12972855 is about 3601.7849741482. The cubic root of 12972855 is about 234.9696958056.

The spelling of 12972855 in words is "twelve million, nine hundred seventy-two thousand, eight hundred fifty-five".