891157 has 16 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 760320.

The previous prime is 891151. The next prime is 891161. The reversal of 891157 is 751198.

891157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 891157 - 2¹⁹ = 366869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891151) 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, 9969 + ... + 10057.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁸⁹¹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

891157 is a deficient number, since it is larger than the sum of its proper divisors (145643).

891157 is a wasteful number, since it uses less digits than its factorization.

891157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its digits is 2520, while the sum is 31.

The square root of 891157 is about 944.0111228158. The cubic root of 891157 is about 96.2316814522.

The spelling of 891157 in words is "eight hundred ninety-one thousand, one hundred fifty-seven".