161010242 has 4 divisors (see below), whose sum is σ = 241515366. Its totient is φ = 80505120.

The previous prime is 161010229. The next prime is 161010253. The reversal of 161010242 is 242010161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 152004241 + 9006001 = 12329^2 + 3001^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161010242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40252559 + ... + 40252562.

Almost surely, 2^161010242 is an apocalyptic number.

161010242 is a deficient number, since it is larger than the sum of its proper divisors (80505124).

161010242 is an equidigital number, since it uses as much as digits as its factorization.

161010242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80505123.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 161010242 is about 12688.9811253702. The cubic root of 161010242 is about 544.0237180583.

The spelling of 161010242 in words is "one hundred sixty-one million, ten thousand, two hundred forty-two".