921159 has 16 divisors (see below), whose sum is σ = 1381600. Its totient is φ = 606528.

The previous prime is 921157. The next prime is 921169. The reversal of 921159 is 951129.

It is a happy number.

921159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 921159 - 2¹ = 921157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

921159 is a lucky number.

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 921159.

It is not an unprimeable number, because it can be changed into a prime (921157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2787 + ... + 3099.

It is an arithmetic number, because the mean of its divisors is an integer number (86350).

2⁹²¹¹⁵⁹ is an apocalyptic number.

921159 is a deficient number, since it is larger than the sum of its proper divisors (460441).

921159 is a wasteful number, since it uses less digits than its factorization.

921159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 921159 is about 959.7702850162. The cubic root of 921159 is about 97.2997071663.

The spelling of 921159 in words is "nine hundred twenty-one thousand, one hundred fifty-nine".