1321465290 has 16 divisors (see below), whose sum is σ = 3171516768. Its totient is φ = 352390736.

The previous prime is 1321465289. The next prime is 1321465319. The reversal of 1321465290 is 925641231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22024392 + ... + 22024451.

It is an arithmetic number, because the mean of its divisors is an integer number (198219798).

Almost surely, 2^1321465290 is an apocalyptic number.

1321465290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321465290 is an abundant number, since it is smaller than the sum of its proper divisors (1850051478).

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

1321465290 is a wasteful number, since it uses less digits than its factorization.

1321465290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44048853.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1321465290 is about 36351.9640459769. The cubic root of 1321465290 is about 1097.3670610024.

The spelling of 1321465290 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, two hundred ninety".