161041901 has 8 divisors (see below), whose sum is σ = 176395320. Its totient is φ = 146341888.

The previous prime is 161041897. The next prime is 161041913. The reversal of 161041901 is 109140161.

It can be written as a sum of positive squares in 4 ways, for example, as 34456900 + 126585001 = 5870^2 + 11251^2 .

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

It is not a de Polignac number, because 161041901 - 2² = 161041897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161041301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162836 + ... + 163821.

It is an arithmetic number, because the mean of its divisors is an integer number (22049415).

Almost surely, 2^161041901 is an apocalyptic number.

It is an amenable number.

161041901 is a deficient number, since it is larger than the sum of its proper divisors (15353419).

161041901 is a wasteful number, since it uses less digits than its factorization.

161041901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326703.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 161041901 is about 12690.2285637415. The cubic root of 161041901 is about 544.0593723495.

The spelling of 161041901 in words is "one hundred sixty-one million, forty-one thousand, nine hundred one".