161205142 has 16 divisors (see below), whose sum is σ = 285881760. Its totient is φ = 66705408.

The previous prime is 161205103. The next prime is 161205167. The reversal of 161205142 is 241502161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198123 + ... + 198934.

It is an arithmetic number, because the mean of its divisors is an integer number (17867610).

Almost surely, 2^161205142 is an apocalyptic number.

161205142 is a deficient number, since it is larger than the sum of its proper divisors (124676618).

161205142 is a wasteful number, since it uses less digits than its factorization.

161205142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397095.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 161205142 is about 12696.6586943180. The cubic root of 161205142 is about 544.2431398531.

The spelling of 161205142 in words is "one hundred sixty-one million, two hundred five thousand, one hundred forty-two".