161442 has 12 divisors (see below), whose sum is σ = 349830. Its totient is φ = 53808.

The previous prime is 161411. The next prime is 161453. The reversal of 161442 is 244161.

161442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 25281 = 369^2 + 159^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 8969 = 161442 / (1 + 6 + 1 + 4 + 4 + 2).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161442.

It is an unprimeable number.

161442 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 5 ways as a sum of consecutive naturals, for example, 4467 + ... + 4502.

2¹⁶¹⁴⁴² is an apocalyptic number.

161442 is an abundant number, since it is smaller than the sum of its proper divisors (188388).

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

161442 is a wasteful number, since it uses less digits than its factorization.

161442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8977 (or 8974 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 161442 is about 401.7984569408. The cubic root of 161442 is about 54.4509560756.

The spelling of 161442 in words is "one hundred sixty-one thousand, four hundred forty-two".