1291042580 has 24 divisors (see below), whose sum is σ = 2711892960. Its totient is φ = 516283040.

The previous prime is 1291042579. The next prime is 1291042583. The reversal of 1291042580 is 852401921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291042583) 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, 114851 + ... + 125589.

It is an arithmetic number, because the mean of its divisors is an integer number (112995540).

Almost surely, 2^1291042580 is an apocalyptic number.

1291042580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291042580 is an abundant number, since it is smaller than the sum of its proper divisors (1420850380).

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

1291042580 is a wasteful number, since it uses less digits than its factorization.

1291042580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16759 (or 16757 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1291042580 is about 35931.0809745546. The cubic root of 1291042580 is about 1088.8804204457.

The spelling of 1291042580 in words is "one billion, two hundred ninety-one million, forty-two thousand, five hundred eighty".