1272153456 has 60 divisors (see below), whose sum is σ = 4068874992. Its totient is φ = 363472128.

The previous prime is 1272153433. The next prime is 1272153461. The reversal of 1272153456 is 6543512721.

1272153456 is a `hidden beast` number, since 1 + 2 + 72 + 1 + 534 + 56 = 666.

It is a super-2 number, since 2×1272153456² = 3236748831225487872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1272153456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630021 + ... + 632036.

Almost surely, 2^1272153456 is an apocalyptic number.

1272153456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272153456 is an abundant number, since it is smaller than the sum of its proper divisors (2796721536).

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

1272153456 is a wasteful number, since it uses less digits than its factorization.

1272153456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262078 (or 1262069 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 1272153456 is about 35667.2602816645. The cubic root of 1272153456 is about 1083.5438729474.

The spelling of 1272153456 in words is "one billion, two hundred seventy-two million, one hundred fifty-three thousand, four hundred fifty-six".