1272873280 has 112 divisors (see below), whose sum is σ = 3508369920. Its totient is φ = 430829568.

The previous prime is 1272873253. The next prime is 1272873293. The reversal of 1272873280 is 823782721.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 173364 + ... + 180556.

Almost surely, 2^1272873280 is an apocalyptic number.

1272873280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272873280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754184960).

1272873280 is an abundant number, since it is smaller than the sum of its proper divisors (2235496640).

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

1272873280 is an equidigital number, since it uses as much as digits as its factorization.

1272873280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7296 (or 7286 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 1272873280 is about 35677.3496773513. The cubic root of 1272873280 is about 1083.7482020238.

The spelling of 1272873280 in words is "one billion, two hundred seventy-two million, eight hundred seventy-three thousand, two hundred eighty".