1290256240539 has 96 divisors (see below), whose sum is σ = 2067611222016. Its totient is φ = 713236285440.

The previous prime is 1290256240513. The next prime is 1290256240561. The reversal of 1290256240539 is 9350426520921.

It is not a de Polignac number, because 1290256240539 - 2²⁰ = 1290255191963 is a prime.

It is a super-2 number, since 2×1290256240539² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1290256240579) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 246558867 + ... + 246564099.

It is an arithmetic number, because the mean of its divisors is an integer number (21537616896).

Almost surely, 2^{1290256240539} is an apocalyptic number.

1290256240539 is a deficient number, since it is larger than the sum of its proper divisors (777354981477).

1290256240539 is a wasteful number, since it uses less digits than its factorization.

1290256240539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 1290256240539 in words is "one trillion, two hundred ninety billion, two hundred fifty-six million, two hundred forty thousand, five hundred thirty-nine".