162891 has 10 divisors (see below), whose sum is σ = 243452. Its totient is φ = 108540.

The previous prime is 162889. The next prime is 162901. The reversal of 162891 is 198261.

It is not a de Polignac number, because 162891 - 2¹ = 162889 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162821) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 925 + ... + 1086.

2¹⁶²⁸⁹¹ is an apocalyptic number.

162891 is a deficient number, since it is larger than the sum of its proper divisors (80561).

162891 is an equidigital number, since it uses as much as digits as its factorization.

162891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023 (or 2014 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 162891 is about 403.5975718460. The cubic root of 162891 is about 54.6133767491.

It can be divided in two parts, 16289 and 1, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 162891 in words is "one hundred sixty-two thousand, eight hundred ninety-one".