1290918870420 has 24 divisors (see below), whose sum is σ = 3614572837344. Its totient is φ = 344245032096.

The previous prime is 1290918870389. The next prime is 1290918870473. The reversal of 1290918870420 is 240788190921.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10757657194 + ... + 10757657313.

It is an arithmetic number, because the mean of its divisors is an integer number (150607201556).

Almost surely, 2^{1290918870420} is an apocalyptic number.

1290918870420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290918870420 is an abundant number, since it is smaller than the sum of its proper divisors (2323653966924).

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

1290918870420 is a wasteful number, since it uses less digits than its factorization.

1290918870420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21515314519 (or 21515314517 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 1290918870420 in words is "one trillion, two hundred ninety billion, nine hundred eighteen million, eight hundred seventy thousand, four hundred twenty".