1272331660 has 12 divisors (see below), whose sum is σ = 2671896528. Its totient is φ = 508932656.

The previous prime is 1272331657. The next prime is 1272331661. The reversal of 1272331660 is 661332721.

It is not an unprimeable number, because it can be changed into a prime (1272331661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31808272 + ... + 31808311.

It is an arithmetic number, because the mean of its divisors is an integer number (222658044).

Almost surely, 2^1272331660 is an apocalyptic number.

1272331660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272331660 is an abundant number, since it is smaller than the sum of its proper divisors (1399564868).

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

1272331660 is a wasteful number, since it uses less digits than its factorization.

1272331660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63616592 (or 63616590 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1272331660 is about 35669.7583395234. The cubic root of 1272331660 is about 1083.5944650716.

The spelling of 1272331660 in words is "one billion, two hundred seventy-two million, three hundred thirty-one thousand, six hundred sixty".