1272843456 has 28 divisors (see below), whose sum is σ = 3367732152. Its totient is φ = 424281088.

The previous prime is 1272843449. The next prime is 1272843461. The reversal of 1272843456 is 6543482721.

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, 3314505 + ... + 3314888.

Almost surely, 2^1272843456 is an apocalyptic number.

1272843456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1272843456 is an abundant number, since it is smaller than the sum of its proper divisors (2094888696).

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

1272843456 is an equidigital number, since it uses as much as digits as its factorization.

1272843456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629408 (or 6629398 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 1272843456 is about 35676.9317066364. The cubic root of 1272843456 is about 1083.7397377199.

The spelling of 1272843456 in words is "one billion, two hundred seventy-two million, eight hundred forty-three thousand, four hundred fifty-six".