1297664724 has 12 divisors (see below), whose sum is σ = 3027884384. Its totient is φ = 432554904.

The previous prime is 1297664699. The next prime is 1297664737. The reversal of 1297664724 is 4274667921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 54069352 + ... + 54069375.

Almost surely, 2^1297664724 is an apocalyptic number.

It is an amenable number.

1297664724 is an abundant number, since it is smaller than the sum of its proper divisors (1730219660).

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

1297664724 is a wasteful number, since it uses less digits than its factorization.

1297664724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108138734 (or 108138732 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 1297664724 is about 36023.1137465933. The cubic root of 1297664724 is about 1090.7389776082.

The spelling of 1297664724 in words is "one billion, two hundred ninety-seven million, six hundred sixty-four thousand, seven hundred twenty-four".