1321298288 has 20 divisors (see below), whose sum is σ = 2565559008. Its totient is φ = 659218560.

The previous prime is 1321298243. The next prime is 1321298299. The reversal of 1321298288 is 8828921231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81773 + ... + 96588.

Almost surely, 2^1321298288 is an apocalyptic number.

It is an amenable number.

1321298288 is a deficient number, since it is larger than the sum of its proper divisors (1244260720).

1321298288 is a wasteful number, since it uses less digits than its factorization.

1321298288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178832 (or 178826 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 1321298288 is about 36349.6669585844. Note that the first 3 decimals coincide. The cubic root of 1321298288 is about 1097.3208319626.

The spelling of 1321298288 in words is "one billion, three hundred twenty-one million, two hundred ninety-eight thousand, two hundred eighty-eight".