161892 has 24 divisors (see below), whose sum is σ = 420000. Its totient is φ = 53928.

The previous prime is 161881. The next prime is 161911. The reversal of 161892 is 298161.

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

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

It is an unprimeable number.

161892 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 7 ways as a sum of consecutive naturals, for example, 642 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (17500).

2¹⁶¹⁸⁹² is an apocalyptic number.

161892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161892 is an abundant number, since it is smaller than the sum of its proper divisors (258108).

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

161892 is a wasteful number, since it uses less digits than its factorization.

161892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 1504 counting only the distinct ones).

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

The square root of 161892 is about 402.3580495032. The cubic root of 161892 is about 54.5015009547.

Subtracting from 161892 its product of digits (864), we obtain a triangular number (161028 = T₅₆₇).

The spelling of 161892 in words is "one hundred sixty-one thousand, eight hundred ninety-two".