161512842 has 8 divisors (see below), whose sum is σ = 323025696. Its totient is φ = 53837612.

The previous prime is 161512823. The next prime is 161512843. The reversal of 161512842 is 248215161.

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

161512842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (161512843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13459398 + ... + 13459409.

It is an arithmetic number, because the mean of its divisors is an integer number (40378212).

Almost surely, 2^161512842 is an apocalyptic number.

161512842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161512842 is a wasteful number, since it uses less digits than its factorization.

161512842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26918812.

The product of its digits is 3840, while the sum is 30.

The square root of 161512842 is about 12708.7702788271. The cubic root of 161512842 is about 544.5891941131.

The spelling of 161512842 in words is "one hundred sixty-one million, five hundred twelve thousand, eight hundred forty-two".