161845042 has 8 divisors (see below), whose sum is σ = 242837532. Its totient is φ = 80899200.

The previous prime is 161845039. The next prime is 161845069. The reversal of 161845042 is 240548161.

161845042 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 158231241 + 3613801 = 12579^2 + 1901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 161844995 and 161845013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059 + ... + 18022.

Almost surely, 2^161845042 is an apocalyptic number.

161845042 is a deficient number, since it is larger than the sum of its proper divisors (80992490).

161845042 is a wasteful number, since it uses less digits than its factorization.

161845042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23324.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 161845042 is about 12721.8332798382. The cubic root of 161845042 is about 544.9623092078.

The spelling of 161845042 in words is "one hundred sixty-one million, eight hundred forty-five thousand, forty-two".