161541 has 16 divisors (see below), whose sum is σ = 248320. Its totient is φ = 103680.

The previous prime is 161531. The next prime is 161543. The reversal of 161541 is 145161.

161541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161541 - 2¹⁷ = 30469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161543) 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, 741 + ... + 933.

It is an arithmetic number, because the mean of its divisors is an integer number (15520).

2¹⁶¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

161541 is a deficient number, since it is larger than the sum of its proper divisors (86779).

161541 is a wasteful number, since it uses less digits than its factorization.

161541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 161541 is about 401.9216341527. The cubic root of 161541 is about 54.4620840000.

The spelling of 161541 in words is "one hundred sixty-one thousand, five hundred forty-one".