165617041 has 4 divisors (see below), whose sum is σ = 165669300. Its totient is φ = 165564784.

The previous prime is 165617029. The next prime is 165617047. The reversal of 165617041 is 140716561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140716561 = 607 ⋅231823.

It can be written as a sum of positive squares in 2 ways, for example, as 109307025 + 56310016 = 10455^2 + 7504^2 .

It is a cyclic number.

It is not a de Polignac number, because 165617041 - 2¹¹ = 165614993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165616994 and 165617012.

It is not an unprimeable number, because it can be changed into a prime (165617047) 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, 21046 + ... + 27823.

It is an arithmetic number, because the mean of its divisors is an integer number (41417325).

Almost surely, 2^165617041 is an apocalyptic number.

It is an amenable number.

165617041 is a deficient number, since it is larger than the sum of its proper divisors (52259).

165617041 is an equidigital number, since it uses as much as digits as its factorization.

165617041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52258.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 165617041 is about 12869.2284539517. The cubic root of 165617041 is about 549.1635119118.

The spelling of 165617041 in words is "one hundred sixty-five million, six hundred seventeen thousand, forty-one".