12749397 has 4 divisors (see below), whose sum is σ = 16999200. Its totient is φ = 8499596.

The previous prime is 12749393. The next prime is 12749413. The reversal of 12749397 is 79394721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12749397 - 2² = 12749393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749393) 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, 2124897 + ... + 2124902.

It is an arithmetic number, because the mean of its divisors is an integer number (4249800).

Almost surely, 2^12749397 is an apocalyptic number.

It is an amenable number.

12749397 is a deficient number, since it is larger than the sum of its proper divisors (4249803).

12749397 is an equidigital number, since it uses as much as digits as its factorization.

12749397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249802.

The product of its digits is 95256, while the sum is 42.

The square root of 12749397 is about 3570.6297763840. The cubic root of 12749397 is about 233.6127534653.

The spelling of 12749397 in words is "twelve million, seven hundred forty-nine thousand, three hundred ninety-seven".