161356242 has 16 divisors (see below), whose sum is σ = 323062560. Its totient is φ = 53727072.

The previous prime is 161356241. The next prime is 161356259. The reversal of 161356242 is 242653161.

161356242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161356241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8392 + ... + 19827.

It is an arithmetic number, because the mean of its divisors is an integer number (20191410).

Almost surely, 2^161356242 is an apocalyptic number.

161356242 is an abundant number, since it is smaller than the sum of its proper divisors (161706318).

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

161356242 is a wasteful number, since it uses less digits than its factorization.

161356242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29177.

The product of its digits is 8640, while the sum is 30.

The square root of 161356242 is about 12702.6076850385. The cubic root of 161356242 is about 544.4131291751.

The spelling of 161356242 in words is "one hundred sixty-one million, three hundred fifty-six thousand, two hundred forty-two".