2161170 has 96 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 501120.

The previous prime is 2161163. The next prime is 2161177. The reversal of 2161170 is 711612.

It is an interprime number because it is at equal distance from previous prime (2161163) and next prime (2161177).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2161177) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36601 + ... + 36659.

It is an arithmetic number, because the mean of its divisors is an integer number (66690).

2^2161170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3201120).

2161170 is an abundant number, since it is smaller than the sum of its proper divisors (4241070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161170 is a wasteful number, since it uses less digits than its factorization.

2161170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 117 counting only the distinct ones).

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

The square root of 2161170 is about 1470.0918338662. The cubic root of 2161170 is about 129.2894168982.

Adding to 2161170 its reverse (711612), we get a palindrome (2872782).

The spelling of 2161170 in words is "two million, one hundred sixty-one thousand, one hundred seventy".