161041 has 4 divisors (see below), whose sum is σ = 170532. Its totient is φ = 151552.

The previous prime is 161039. The next prime is 161047. The reversal of 161041 is 140161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140161 = 7 ⋅20023.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 16641 = 380^2 + 129^2 .

It is a cyclic number.

It is not a de Polignac number, because 161041 - 2¹ = 161039 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720 + ... + 4753.

It is an arithmetic number, because the mean of its divisors is an integer number (42633).

2¹⁶¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

161041 is a deficient number, since it is larger than the sum of its proper divisors (9491).

161041 is an equidigital number, since it uses as much as digits as its factorization.

161041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9490.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 161041 is about 401.2991402931. The cubic root of 161041 is about 54.4058357710.

Subtracting from 161041 its sum of digits (13), we obtain a triangular number (161028 = T₅₆₇).

The spelling of 161041 in words is "one hundred sixty-one thousand, forty-one".