12947518 has 8 divisors (see below), whose sum is σ = 19449648. Its totient is φ = 6464304.

The previous prime is 12947507. The next prime is 12947527. The reversal of 12947518 is 81574921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2871 + ... + 5842.

It is an arithmetic number, because the mean of its divisors is an integer number (2431206).

Almost surely, 2^12947518 is an apocalyptic number.

12947518 is a deficient number, since it is larger than the sum of its proper divisors (6502130).

12947518 is an equidigital number, since it uses as much as digits as its factorization.

12947518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9458.

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

The square root of 12947518 is about 3598.2659712701. The cubic root of 12947518 is about 234.8166247140.

The spelling of 12947518 in words is "twelve million, nine hundred forty-seven thousand, five hundred eighteen".