161143242 has 32 divisors (see below), whose sum is σ = 348872832. Its totient is φ = 49326144.

The previous prime is 161143217. The next prime is 161143249. The reversal of 161143242 is 242341161.

It is not an unprimeable number, because it can be changed into a prime (161143249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10123 + ... + 20609.

It is an arithmetic number, because the mean of its divisors is an integer number (10902276).

Almost surely, 2^161143242 is an apocalyptic number.

161143242 is an abundant number, since it is smaller than the sum of its proper divisors (187729590).

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

161143242 is a wasteful number, since it uses less digits than its factorization.

161143242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10702.

The product of its digits is 1152, while the sum is 24.

The square root of 161143242 is about 12694.2208110620. The cubic root of 161143242 is about 544.1734709356.

The spelling of 161143242 in words is "one hundred sixty-one million, one hundred forty-three thousand, two hundred forty-two".