1291036480 has 28 divisors (see below), whose sum is σ = 3074281380. Its totient is φ = 516414464.

The previous prime is 1291036477. The next prime is 1291036499. The reversal of 1291036480 is 846301921.

It can be written as a sum of positive squares in 2 ways, for example, as 480837184 + 810199296 = 21928^2 + 28464^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016925 + ... + 2017564.

Almost surely, 2^1291036480 is an apocalyptic number.

1291036480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291036480 is an abundant number, since it is smaller than the sum of its proper divisors (1783244900).

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

1291036480 is an equidigital number, since it uses as much as digits as its factorization.

1291036480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034506 (or 4034496 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1291036480 is about 35930.9960897273. The cubic root of 1291036480 is about 1088.8787055058.

The spelling of 1291036480 in words is "one billion, two hundred ninety-one million, thirty-six thousand, four hundred eighty".