1275299456 has 64 divisors (see below), whose sum is σ = 2696064000. Its totient is φ = 599187456.

The previous prime is 1275299453. The next prime is 1275299471. The reversal of 1275299456 is 6549925721.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1275299453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306800 + ... + 310928.

It is an arithmetic number, because the mean of its divisors is an integer number (42126000).

Almost surely, 2^1275299456 is an apocalyptic number.

1275299456 is a gapful number since it is divisible by the number (16) 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 1275299456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348032000).

1275299456 is an abundant number, since it is smaller than the sum of its proper divisors (1420764544).

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

1275299456 is a wasteful number, since it uses less digits than its factorization.

1275299456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289 (or 4277 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 50.

The square root of 1275299456 is about 35711.3351192587. The cubic root of 1275299456 is about 1084.4363289329.

The spelling of 1275299456 in words is "one billion, two hundred seventy-five million, two hundred ninety-nine thousand, four hundred fifty-six".