1272299520 has 240 divisors, whose sum is σ = 4227729408. Its totient is φ = 326369280.

The previous prime is 1272299507. The next prime is 1272299543. The reversal of 1272299520 is 259922721.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7618477 + ... + 7618643.

Almost surely, 2^1272299520 is an apocalyptic number.

1272299520 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 1272299520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2113864704).

1272299520 is an abundant number, since it is smaller than the sum of its proper divisors (2955429888).

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

1272299520 is an equidigital number, since it uses as much as digits as its factorization.

1272299520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1272299520 is about 35669.3078149829. The cubic root of 1272299520 is about 1083.5853408732.

The spelling of 1272299520 in words is "one billion, two hundred seventy-two million, two hundred ninety-nine thousand, five hundred twenty".