1247394472 has 16 divisors (see below), whose sum is σ = 2339424000. Its totient is φ = 623548080.

The previous prime is 1247394469. The next prime is 1247394497. The reversal of 1247394472 is 2744937421.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22147 + ... + 54637.

It is an arithmetic number, because the mean of its divisors is an integer number (146214000).

Almost surely, 2^1247394472 is an apocalyptic number.

It is an amenable number.

1247394472 is a deficient number, since it is larger than the sum of its proper divisors (1092029528).

1247394472 is a wasteful number, since it uses less digits than its factorization.

1247394472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37296 (or 37292 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 1247394472 is about 35318.4721073831. The cubic root of 1247394472 is about 1076.4683657237.

The spelling of 1247394472 in words is "one billion, two hundred forty-seven million, three hundred ninety-four thousand, four hundred seventy-two".