12397481 has 4 divisors (see below), whose sum is σ = 13050000. Its totient is φ = 11744964.

The previous prime is 12397477. The next prime is 12397487. The reversal of 12397481 is 18479321.

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 not a de Polignac number, because 12397481 - 2² = 12397477 is a prime.

It is a super-2 number, since 2×12397481² = 307395070290722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12397487) 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, 326231 + ... + 326268.

It is an arithmetic number, because the mean of its divisors is an integer number (3262500).

Almost surely, 2^12397481 is an apocalyptic number.

It is an amenable number.

12397481 is a deficient number, since it is larger than the sum of its proper divisors (652519).

12397481 is an equidigital number, since it uses as much as digits as its factorization.

12397481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652518.

The product of its digits is 12096, while the sum is 35.

The square root of 12397481 is about 3521.0056801999. The cubic root of 12397481 is about 231.4432311389.

The spelling of 12397481 in words is "twelve million, three hundred ninety-seven thousand, four hundred eighty-one".