161435442 has 16 divisors (see below), whose sum is σ = 368995392. Its totient is φ = 46124400.

The previous prime is 161435437. The next prime is 161435453. The reversal of 161435442 is 244534161.

It is a super-2 number, since 2×161435442² = 52122803867470728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921809 + ... + 1921892.

It is an arithmetic number, because the mean of its divisors is an integer number (23062212).

Almost surely, 2^161435442 is an apocalyptic number.

161435442 is an abundant number, since it is smaller than the sum of its proper divisors (207559950).

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

161435442 is a wasteful number, since it uses less digits than its factorization.

161435442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843713.

The product of its digits is 11520, while the sum is 30.

The square root of 161435442 is about 12705.7247727156. The cubic root of 161435442 is about 544.5021877423.

The spelling of 161435442 in words is "one hundred sixty-one million, four hundred thirty-five thousand, four hundred forty-two".