12447747 has 12 divisors (see below), whose sum is σ = 19363344. Its totient is φ = 7660080.

The previous prime is 12447731. The next prime is 12447767. The reversal of 12447747 is 74774421.

12447747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12447747 - 2⁴ = 12447731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12447727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53079 + ... + 53312.

It is an arithmetic number, because the mean of its divisors is an integer number (1613612).

Almost surely, 2^12447747 is an apocalyptic number.

12447747 is a deficient number, since it is larger than the sum of its proper divisors (6915597).

12447747 is a wasteful number, since it uses less digits than its factorization.

12447747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106410 (or 106407 counting only the distinct ones).

The product of its digits is 43904, while the sum is 36.

The square root of 12447747 is about 3528.1364769521. The cubic root of 12447747 is about 231.7556074372.

The spelling of 12447747 in words is "twelve million, four hundred forty-seven thousand, seven hundred forty-seven".