161542 has 12 divisors (see below), whose sum is σ = 253260. Its totient is φ = 77256.

The previous prime is 161531. The next prime is 161543. The reversal of 161542 is 245161.

161542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2709 + ... + 2767.

It is an arithmetic number, because the mean of its divisors is an integer number (21105).

2¹⁶¹⁵⁴² is an apocalyptic number.

161542 is a deficient number, since it is larger than the sum of its proper divisors (91718).

161542 is an equidigital number, since it uses as much as digits as its factorization.

161542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 98 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 161542 is about 401.9228781744. The cubic root of 161542 is about 54.4621963801.

It can be divided in two parts, 161 and 542, that added together give a triangular number (703 = T₃₇).

The spelling of 161542 in words is "one hundred sixty-one thousand, five hundred forty-two".