1298313921 has 8 divisors (see below), whose sum is σ = 1771343200. Its totient is φ = 845413632.

The previous prime is 1298313911. The next prime is 1298313937. The reversal of 1298313921 is 1293138921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1298313921 - 2⁶ = 1298313857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1298313921.

It is not an unprimeable number, because it can be changed into a prime (1298313911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5032096 + ... + 5032353.

It is an arithmetic number, because the mean of its divisors is an integer number (221417900).

Almost surely, 2^1298313921 is an apocalyptic number.

It is an amenable number.

1298313921 is a deficient number, since it is larger than the sum of its proper divisors (473029279).

1298313921 is a wasteful number, since it uses less digits than its factorization.

1298313921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10064495.

The product of its digits is 23328, while the sum is 39.

The square root of 1298313921 is about 36032.1234594910. The cubic root of 1298313921 is about 1090.9208392781.

The spelling of 1298313921 in words is "one billion, two hundred ninety-eight million, three hundred thirteen thousand, nine hundred twenty-one".