1272490800 has 720 divisors, whose sum is σ = 5363763840. Its totient is φ = 255467520.

The previous prime is 1272490799. The next prime is 1272490811. The reversal of 1272490800 is 80942721.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18992367 + ... + 18992433.

It is an arithmetic number, because the mean of its divisors is an integer number (7449672).

Almost surely, 2^1272490800 is an apocalyptic number.

1272490800 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 1272490800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2681881920).

1272490800 is an abundant number, since it is smaller than the sum of its proper divisors (4091273040).

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

1272490800 is a wasteful number, since it uses less digits than its factorization.

1272490800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1272490800 is about 35671.9890109873. The cubic root of 1272490800 is about 1083.6396409324.

The spelling of 1272490800 in words is "one billion, two hundred seventy-two million, four hundred ninety thousand, eight hundred".