12972289 has 6 divisors (see below), whose sum is σ = 14258930. Its totient is φ = 11792880.

The previous prime is 12972263. The next prime is 12972293. The reversal of 12972289 is 98227921.

12972289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6682225 + 6290064 = 2585^2 + 2508^2 .

It is not a de Polignac number, because 12972289 - 2⁵ = 12972257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12972689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53484 + ... + 53725.

Almost surely, 2^12972289 is an apocalyptic number.

It is an amenable number.

12972289 is a deficient number, since it is larger than the sum of its proper divisors (1286641).

12972289 is a wasteful number, since it uses less digits than its factorization.

12972289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107231 (or 107220 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 12972289 is about 3601.7064011382. The cubic root of 12972289 is about 234.9662785475.

The spelling of 12972289 in words is "twelve million, nine hundred seventy-two thousand, two hundred eighty-nine".