12672391 has 4 divisors (see below), whose sum is σ = 13109400. Its totient is φ = 12235384.

The previous prime is 12672383. The next prime is 12672409. The reversal of 12672391 is 19327621.

12672391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12672391 - 2³ = 12672383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12672691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218461 + ... + 218518.

It is an arithmetic number, because the mean of its divisors is an integer number (3277350).

Almost surely, 2^12672391 is an apocalyptic number.

12672391 is a deficient number, since it is larger than the sum of its proper divisors (437009).

12672391 is an equidigital number, since it uses as much as digits as its factorization.

12672391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437008.

The product of its digits is 4536, while the sum is 31.

The square root of 12672391 is about 3559.8301925794. The cubic root of 12672391 is about 233.1414651741.

The spelling of 12672391 in words is "twelve million, six hundred seventy-two thousand, three hundred ninety-one".