12478915 has 8 divisors (see below), whose sum is σ = 15762960. Its totient is φ = 9457632.

The previous prime is 12478909. The next prime is 12478933. The reversal of 12478915 is 51987421.

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

It is a cyclic number.

It is not a de Polignac number, because 12478915 - 2¹³ = 12470723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65584 + ... + 65773.

It is an arithmetic number, because the mean of its divisors is an integer number (1970370).

Almost surely, 2^12478915 is an apocalyptic number.

12478915 is a deficient number, since it is larger than the sum of its proper divisors (3284045).

12478915 is a wasteful number, since it uses less digits than its factorization.

12478915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131381.

The product of its digits is 20160, while the sum is 37.

The square root of 12478915 is about 3532.5507781205. The cubic root of 12478915 is about 231.9488777073.

The spelling of 12478915 in words is "twelve million, four hundred seventy-eight thousand, nine hundred fifteen".