1081921712 has 20 divisors (see below), whose sum is σ = 2206551480. Its totient is φ = 512489088.

The previous prime is 1081921663. The next prime is 1081921723. The reversal of 1081921712 is 2171291801.

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, 1779173 + ... + 1779780.

It is an arithmetic number, because the mean of its divisors is an integer number (110327574).

Almost surely, 2^1081921712 is an apocalyptic number.

It is an amenable number.

1081921712 is an abundant number, since it is smaller than the sum of its proper divisors (1124629768).

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

1081921712 is a wasteful number, since it uses less digits than its factorization.

1081921712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558980 (or 3558974 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 1081921712 is about 32892.5783726360. The cubic root of 1081921712 is about 1026.5937410018.

The spelling of 1081921712 in words is "one billion, eighty-one million, nine hundred twenty-one thousand, seven hundred twelve".