1247040724 has 12 divisors (see below), whose sum is σ = 2198022400. Its totient is φ = 619034328.

The previous prime is 1247040713. The next prime is 1247040727. The reversal of 1247040724 is 4270407421.

It is a super-2 number, since 2×1247040724² = 3110221134628888352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247040727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120884 + ... + 1121995.

Almost surely, 2^1247040724 is an apocalyptic number.

It is an amenable number.

1247040724 is a deficient number, since it is larger than the sum of its proper divisors (950981676).

1247040724 is a wasteful number, since it uses less digits than its factorization.

1247040724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243022 (or 2243020 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 1247040724 is about 35313.4637779983. The cubic root of 1247040724 is about 1076.3665977205.

The spelling of 1247040724 in words is "one billion, two hundred forty-seven million, forty thousand, seven hundred twenty-four".