1297591272 has 32 divisors (see below), whose sum is σ = 3604420800. Its totient is φ = 432530352.

The previous prime is 1297591261. The next prime is 1297591291. The reversal of 1297591272 is 2721957921.

1297591272 is a `hidden beast` number, since 1 + 297 + 5 + 91 + 272 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3003468 + ... + 3003899.

It is an arithmetic number, because the mean of its divisors is an integer number (112638150).

Almost surely, 2^1297591272 is an apocalyptic number.

1297591272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1297591272 is an abundant number, since it is smaller than the sum of its proper divisors (2306829528).

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

1297591272 is a wasteful number, since it uses less digits than its factorization.

1297591272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007382 (or 6007372 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 1297591272 is about 36022.0942200755. The cubic root of 1297591272 is about 1090.7183974410.

The spelling of 1297591272 in words is "one billion, two hundred ninety-seven million, five hundred ninety-one thousand, two hundred seventy-two".