1321971404 has 18 divisors (see below), whose sum is σ = 2505097980. Its totient is φ = 610140336.

The previous prime is 1321971353. The next prime is 1321971419. The reversal of 1321971404 is 4041791231.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 977114 + ... + 978465.

It is an arithmetic number, because the mean of its divisors is an integer number (139172110).

Almost surely, 2^1321971404 is an apocalyptic number.

It is an amenable number.

1321971404 is a deficient number, since it is larger than the sum of its proper divisors (1183126576).

1321971404 is a wasteful number, since it uses less digits than its factorization.

1321971404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955609 (or 1955594 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1321971404 is about 36358.9246815689. The cubic root of 1321971404 is about 1097.5071383211.

The spelling of 1321971404 in words is "one billion, three hundred twenty-one million, nine hundred seventy-one thousand, four hundred four".