12921972 has 48 divisors (see below), whose sum is σ = 36489600. Its totient is φ = 3474432.

The previous prime is 12921967. The next prime is 12922001. The reversal of 12921972 is 27912921.

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 15 ways as a sum of consecutive naturals, for example, 3097 + ... + 5952.

It is an arithmetic number, because the mean of its divisors is an integer number (760200).

Almost surely, 2^12921972 is an apocalyptic number.

12921972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12921972 is an abundant number, since it is smaller than the sum of its proper divisors (23567628).

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

12921972 is a wasteful number, since it uses less digits than its factorization.

12921972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080 (or 9078 counting only the distinct ones).

The product of its digits is 4536, while the sum is 33.

The square root of 12921972 is about 3594.7144531937. The cubic root of 12921972 is about 234.6620886604.

The spelling of 12921972 in words is "twelve million, nine hundred twenty-one thousand, nine hundred seventy-two".