161940241 has 8 divisors (see below), whose sum is σ = 163031904. Its totient is φ = 160852800.

The previous prime is 161940223. The next prime is 161940277. The reversal of 161940241 is 142049161.

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

It is a cyclic number.

It is not a de Polignac number, because 161940241 - 2⁵ = 161940209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161940041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112770 + ... + 114196.

It is an arithmetic number, because the mean of its divisors is an integer number (20378988).

Almost surely, 2^161940241 is an apocalyptic number.

It is an amenable number.

161940241 is a deficient number, since it is larger than the sum of its proper divisors (1091663).

161940241 is a wasteful number, since it uses less digits than its factorization.

161940241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 161940241 is about 12725.5742895949. The cubic root of 161940241 is about 545.0691391679.

The spelling of 161940241 in words is "one hundred sixty-one million, nine hundred forty thousand, two hundred forty-one".