1297805976 has 80 divisors (see below), whose sum is σ = 3848918040. Its totient is φ = 407151360.

The previous prime is 1297805909. The next prime is 1297806007. The reversal of 1297805976 is 6795087921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47890 + ... + 69921.

Almost surely, 2^1297805976 is an apocalyptic number.

It is an amenable number.

1297805976 is an abundant number, since it is smaller than the sum of its proper divisors (2551112064).

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

1297805976 is a wasteful number, since it uses less digits than its factorization.

1297805976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117846 (or 117833 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1297805976 is about 36025.0742677930. The cubic root of 1297805976 is about 1090.7785521530.

The spelling of 1297805976 in words is "one billion, two hundred ninety-seven million, eight hundred five thousand, nine hundred seventy-six".