1321057494 has 24 divisors (see below), whose sum is σ = 2901503592. Its totient is φ = 434319840.

The previous prime is 1321057487. The next prime is 1321057511. The reversal of 1321057494 is 4947501231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501372 + ... + 503999.

It is an arithmetic number, because the mean of its divisors is an integer number (120895983).

Almost surely, 2^1321057494 is an apocalyptic number.

1321057494 is an abundant number, since it is smaller than the sum of its proper divisors (1580446098).

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

1321057494 is a wasteful number, since it uses less digits than its factorization.

1321057494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005452 (or 1005449 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1321057494 is about 36346.3546177605. The cubic root of 1321057494 is about 1097.2541691640.

The spelling of 1321057494 in words is "one billion, three hundred twenty-one million, fifty-seven thousand, four hundred ninety-four".