161642341 has 16 divisors (see below), whose sum is σ = 197112960. Its totient is φ = 129392640.

The previous prime is 161642323. The next prime is 161642389. The reversal of 161642341 is 143246161.

It is a cyclic number.

It is not a de Polignac number, because 161642341 - 2⁵ = 161642309 is a prime.

It is a super-2 number, since 2×161642341² = 52256492807920562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161642311) 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, 10405 + ... + 20773.

It is an arithmetic number, because the mean of its divisors is an integer number (12319560).

Almost surely, 2^161642341 is an apocalyptic number.

It is an amenable number.

161642341 is a deficient number, since it is larger than the sum of its proper divisors (35470619).

161642341 is a wasteful number, since it uses less digits than its factorization.

161642341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524.

The product of its digits is 3456, while the sum is 28.

The square root of 161642341 is about 12713.8641254341. The cubic root of 161642341 is about 544.7347035252.

The spelling of 161642341 in words is "one hundred sixty-one million, six hundred forty-two thousand, three hundred forty-one".