161392 has 40 divisors (see below), whose sum is σ = 392832. Its totient is φ = 62400.

The previous prime is 161387. The next prime is 161407. The reversal of 161392 is 293161.

161392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

161392 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, 1167 + ... + 1297.

2¹⁶¹³⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196416).

161392 is an abundant number, since it is smaller than the sum of its proper divisors (231440).

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

161392 is a wasteful number, since it uses less digits than its factorization.

161392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 151 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 161392 is about 401.7362318736. The cubic root of 161392 is about 54.4453341826.

Subtracting 161392 from its reverse (293161), we obtain a square (131769 = 363²).

The spelling of 161392 in words is "one hundred sixty-one thousand, three hundred ninety-two".