161045 has 8 divisors (see below), whose sum is σ = 199680. Its totient is φ = 124560.

The previous prime is 161039. The next prime is 161047. The reversal of 161045 is 540161.

It is a happy number.

161045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161045 - 2⁶ = 160981 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 365 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (24960).

161045 is a Friedman number, since it can be written as (10+1^4)^5-6, using all its digits and the basic arithmetic operations.

2¹⁶¹⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

161045 is a deficient number, since it is larger than the sum of its proper divisors (38635).

161045 is a wasteful number, since it uses less digits than its factorization.

161045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 161045 is about 401.3041240755. The cubic root of 161045 is about 54.4062862185.

Subtracting from 161045 its sum of digits (17), we obtain a triangular number (161028 = T₅₆₇).

The spelling of 161045 in words is "one hundred sixty-one thousand, forty-five".