12972249 has 6 divisors (see below), whose sum is σ = 18737706. Its totient is φ = 8648160.

The previous prime is 12972233. The next prime is 12972257. The reversal of 12972249 is 94227921.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 2082249 = 3300^2 + 1443^2 .

It is not a de Polignac number, because 12972249 - 2⁴ = 12972233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12972149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720672 + ... + 720689.

It is an arithmetic number, because the mean of its divisors is an integer number (3122951).

Almost surely, 2^12972249 is an apocalyptic number.

It is an amenable number.

12972249 is a deficient number, since it is larger than the sum of its proper divisors (5765457).

12972249 is a wasteful number, since it uses less digits than its factorization.

12972249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441367 (or 1441364 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12972249 is about 3601.7008482105. The cubic root of 12972249 is about 234.9660370414.

The spelling of 12972249 in words is "twelve million, nine hundred seventy-two thousand, two hundred forty-nine".