1321071080 has 32 divisors (see below), whose sum is σ = 3397040640. Its totient is φ = 452938560.

The previous prime is 1321071061. The next prime is 1321071091. The reversal of 1321071080 is 801701231.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358776 + ... + 2359335.

It is an arithmetic number, because the mean of its divisors is an integer number (106157520).

Almost surely, 2^1321071080 is an apocalyptic number.

1321071080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321071080 is an abundant number, since it is smaller than the sum of its proper divisors (2075969560).

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

1321071080 is a wasteful number, since it uses less digits than its factorization.

1321071080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718129 (or 4718125 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 1321071080 is about 36346.5415136021. The cubic root of 1321071080 is about 1097.2579306062.

The spelling of 1321071080 in words is "one billion, three hundred twenty-one million, seventy-one thousand, eighty".