1321149648 has 160 divisors (see below), whose sum is σ = 4421939200. Its totient is φ = 330075648.

The previous prime is 1321149623. The next prime is 1321149659. The reversal of 1321149648 is 8469411231.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75033 + ... + 90951.

It is an arithmetic number, because the mean of its divisors is an integer number (27637120).

Almost surely, 2^1321149648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321149648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2210969600).

1321149648 is an abundant number, since it is smaller than the sum of its proper divisors (3100789552).

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

1321149648 is a wasteful number, since it uses less digits than its factorization.

1321149648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15969 (or 15963 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1321149648 is about 36347.6223156343. The cubic root of 1321149648 is about 1097.2796825652.

The spelling of 1321149648 in words is "one billion, three hundred twenty-one million, one hundred forty-nine thousand, six hundred forty-eight".