161784842 has 8 divisors (see below), whose sum is σ = 243365796. Its totient is φ = 80662912.

The previous prime is 161784817. The next prime is 161784851. The reversal of 161784842 is 248487161.

161784842 is digitally balanced in base 3, 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 161772961 + 11881 = 12719^2 + 109^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 161784842.

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, 113873 + ... + 115284.

Almost surely, 2^161784842 is an apocalyptic number.

161784842 is a deficient number, since it is larger than the sum of its proper divisors (81580954).

161784842 is a wasteful number, since it uses less digits than its factorization.

161784842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229512.

The product of its digits is 86016, while the sum is 41.

The square root of 161784842 is about 12719.4670485834. The cubic root of 161784842 is about 544.8947326357.

The spelling of 161784842 in words is "one hundred sixty-one million, seven hundred eighty-four thousand, eight hundred forty-two".