921056 has 24 divisors (see below), whose sum is σ = 1837080. Its totient is φ = 454528.

The previous prime is 921031. The next prime is 921073. The reversal of 921056 is 650129.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921056.

It is an unprimeable number.

921056 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290 + ... + 3558.

It is an arithmetic number, because the mean of its divisors is an integer number (76545).

2⁹²¹⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

921056 is a deficient number, since it is larger than the sum of its proper divisors (916024).

921056 is a wasteful number, since it uses less digits than its factorization.

921056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 921056 is about 959.7166248430. The cubic root of 921056 is about 97.2960804875.

The spelling of 921056 in words is "nine hundred twenty-one thousand, fifty-six".