161020242 has 24 divisors (see below), whose sum is σ = 350383644. Its totient is φ = 53441664.

The previous prime is 161020213. The next prime is 161020259. The reversal of 161020242 is 242020161.

161020242 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 2 ways, for example, as 150773841 + 10246401 = 12279^2 + 3201^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15003 + ... + 23390.

Almost surely, 2^161020242 is an apocalyptic number.

161020242 is an abundant number, since it is smaller than the sum of its proper divisors (189363402).

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

161020242 is a wasteful number, since it uses less digits than its factorization.

161020242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38634 (or 38631 counting only the distinct ones).

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

The square root of 161020242 is about 12689.3751619219. The cubic root of 161020242 is about 544.0349805397.

The spelling of 161020242 in words is "one hundred sixty-one million, twenty thousand, two hundred forty-two".