1275328960 has 28 divisors (see below), whose sum is σ = 3036877848. Its totient is φ = 510131456.

The previous prime is 1275328939. The next prime is 1275328991. The reversal of 1275328960 is 698235721.

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 3 ways as a sum of consecutive naturals, for example, 1992382 + ... + 1993021.

Almost surely, 2^1275328960 is an apocalyptic number.

1275328960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275328960 is an abundant number, since it is smaller than the sum of its proper divisors (1761548888).

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

1275328960 is an equidigital number, since it uses as much as digits as its factorization.

1275328960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985420 (or 3985410 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1275328960 is about 35711.7482069977. The cubic root of 1275328960 is about 1084.4446916649. Note that the first 3 decimals are identical.

The spelling of 1275328960 in words is "one billion, two hundred seventy-five million, three hundred twenty-eight thousand, nine hundred sixty".