12947240 has 32 divisors (see below), whose sum is σ = 29237760. Its totient is φ = 5160000.

The previous prime is 12947237. The next prime is 12947261. The reversal of 12947240 is 4274921.

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 7 ways as a sum of consecutive naturals, for example, 16865 + ... + 17615.

It is an arithmetic number, because the mean of its divisors is an integer number (913680).

Almost surely, 2^12947240 is an apocalyptic number.

12947240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12947240 is an abundant number, since it is smaller than the sum of its proper divisors (16290520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12947240 is a wasteful number, since it uses less digits than its factorization.

12947240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 12947240 is about 3598.2273413446. The cubic root of 12947240 is about 234.8149440961.

The spelling of 12947240 in words is "twelve million, nine hundred forty-seven thousand, two hundred forty".