12315397 has 4 divisors (see below), whose sum is σ = 12325600. Its totient is φ = 12305196.

The previous prime is 12315383. The next prime is 12315403. The reversal of 12315397 is 79351321.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12315397 - 2¹⁵ = 12282629 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 (12315367) 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, 3003 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (3081400).

Almost surely, 2^12315397 is an apocalyptic number.

It is an amenable number.

12315397 is a deficient number, since it is larger than the sum of its proper divisors (10203).

12315397 is an equidigital number, since it uses as much as digits as its factorization.

12315397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202.

The product of its digits is 5670, while the sum is 31.

The square root of 12315397 is about 3509.3299930329. The cubic root of 12315397 is about 230.9313026982.

The spelling of 12315397 in words is "twelve million, three hundred fifteen thousand, three hundred ninety-seven".