921080 has 16 divisors (see below), whose sum is σ = 2072520. Its totient is φ = 368416.

The previous prime is 921079. The next prime is 921091. The reversal of 921080 is 80129.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474 + ... + 11553.

2⁹²¹⁰⁸⁰ is an apocalyptic number.

It is an amenable number.

921080 is an abundant number, since it is smaller than the sum of its proper divisors (1151440).

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

921080 is a wasteful number, since it uses less digits than its factorization.

921080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23038 (or 23034 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 921080 is about 959.7291284524. The cubic root of 921080 is about 97.2969255630.

The spelling of 921080 in words is "nine hundred twenty-one thousand, eighty".