1272617472 has 80 divisors (see below), whose sum is σ = 3874698432. Its totient is φ = 363601920.

The previous prime is 1272617461. The next prime is 1272617477. The reversal of 1272617472 is 2747162721.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1272617472.

It is not an unprimeable number, because it can be changed into a prime (1272617477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48429 + ... + 69932.

Almost surely, 2^1272617472 is an apocalyptic number.

1272617472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1272617472 is an abundant number, since it is smaller than the sum of its proper divisors (2602080960).

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

1272617472 is an equidigital number, since it uses as much as digits as its factorization.

1272617472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118389 (or 118373 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 1272617472 is about 35673.7644775541. The cubic root of 1272617472 is about 1083.6755972490.

The spelling of 1272617472 in words is "one billion, two hundred seventy-two million, six hundred seventeen thousand, four hundred seventy-two".