1297732992 has 32 divisors (see below), whose sum is σ = 3447104280. Its totient is φ = 432577536.

The previous prime is 1297732987. The next prime is 1297733009. The reversal of 1297732992 is 2992377921.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1297732992² = 3368221837050544128, which contains 22 as substring.

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, 1689373 + ... + 1690140.

Almost surely, 2^1297732992 is an apocalyptic number.

1297732992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1297732992 is an abundant number, since it is smaller than the sum of its proper divisors (2149371288).

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

1297732992 is an equidigital number, since it uses as much as digits as its factorization.

1297732992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379530 (or 3379518 counting only the distinct ones).

The product of its digits is 857304, while the sum is 51.

The square root of 1297732992 is about 36024.0612924195. The cubic root of 1297732992 is about 1090.7581045988.

The spelling of 1297732992 in words is "one billion, two hundred ninety-seven million, seven hundred thirty-two thousand, nine hundred ninety-two".