1291680486 has 32 divisors (see below), whose sum is σ = 2880577920. Its totient is φ = 429033672.

The previous prime is 1291680479. The next prime is 1291680491. The reversal of 1291680486 is 6840861921.

1291680486 is a `hidden beast` number, since 1 + 2 + 9 + 168 + 0 + 486 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26980 + ... + 57543.

It is an arithmetic number, because the mean of its divisors is an integer number (90018060).

Almost surely, 2^1291680486 is an apocalyptic number.

1291680486 is an abundant number, since it is smaller than the sum of its proper divisors (1588897434).

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

1291680486 is a wasteful number, since it uses less digits than its factorization.

1291680486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84817 (or 84811 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1291680486 is about 35939.9566777702. The cubic root of 1291680486 is about 1089.0597300450.

The spelling of 1291680486 in words is "one billion, two hundred ninety-one million, six hundred eighty thousand, four hundred eighty-six".