2161017 has 6 divisors (see below), whose sum is σ = 3121482. Its totient is φ = 1440672.

The previous prime is 2161007. The next prime is 2161031. The reversal of 2161017 is 7101612.

It can be written as a sum of positive squares in only one way, i.e., 2013561 + 147456 = 1419^2 + 384^2 .

It is not a de Polignac number, because 2161017 - 2⁴ = 2161001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120048 + ... + 120065.

It is an arithmetic number, because the mean of its divisors is an integer number (520247).

2^2161017 is an apocalyptic number.

It is an amenable number.

2161017 is a deficient number, since it is larger than the sum of its proper divisors (960465).

2161017 is a wasteful number, since it uses less digits than its factorization.

2161017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240119 (or 240116 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 2161017 is about 1470.0397953797. The cubic root of 2161017 is about 129.2863658121.

Adding to 2161017 its reverse (7101612), we get a palindrome (9262629).

The spelling of 2161017 in words is "two million, one hundred sixty-one thousand, seventeen".