12972015 has 96 divisors (see below), whose sum is σ = 28071360. Its totient is φ = 5660928.

The previous prime is 12972007. The next prime is 12972067. The reversal of 12972015 is 51027921.

It is not a de Polignac number, because 12972015 - 2³ = 12972007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12972015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 244729 + ... + 244781.

It is an arithmetic number, because the mean of its divisors is an integer number (292410).

Almost surely, 2^12972015 is an apocalyptic number.

12972015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12972015 is an abundant number, since it is smaller than the sum of its proper divisors (15099345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12972015 is a wasteful number, since it uses less digits than its factorization.

12972015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12972015 is about 3601.6683634116. The cubic root of 12972015 is about 234.9646242208.

Adding to 12972015 its reverse (51027921), we get a palindrome (63999936).

The spelling of 12972015 in words is "twelve million, nine hundred seventy-two thousand, fifteen".