12397478 has 8 divisors (see below), whose sum is σ = 18636480. Its totient is φ = 6185320.

The previous prime is 12397477. The next prime is 12397487. The reversal of 12397478 is 87479321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397477) 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, 5513 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (2329560).

Almost surely, 2^12397478 is an apocalyptic number.

12397478 is a deficient number, since it is larger than the sum of its proper divisors (6239002).

12397478 is a wasteful number, since it uses less digits than its factorization.

12397478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422.

The product of its digits is 84672, while the sum is 41.

The square root of 12397478 is about 3521.0052541852. The cubic root of 12397478 is about 231.4432124704.

The spelling of 12397478 in words is "twelve million, three hundred ninety-seven thousand, four hundred seventy-eight".