1272181296 has 20 divisors (see below), whose sum is σ = 3286468472. Its totient is φ = 424060416.

The previous prime is 1272181243. The next prime is 1272181303. The reversal of 1272181296 is 6921812721.

It is an alternating number because its digits alternate between odd and even.

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, 13251841 + ... + 13251936.

Almost surely, 2^1272181296 is an apocalyptic number.

1272181296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272181296 is an abundant number, since it is smaller than the sum of its proper divisors (2014287176).

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

1272181296 is a wasteful number, since it uses less digits than its factorization.

1272181296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26503788 (or 26503782 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 1272181296 is about 35667.6505534076. The cubic root of 1272181296 is about 1083.5517770361.

The spelling of 1272181296 in words is "one billion, two hundred seventy-two million, one hundred eighty-one thousand, two hundred ninety-six".