2168945 has 24 divisors (see below), whose sum is σ = 2947200. Its totient is φ = 1527552.

The previous prime is 2168921. The next prime is 2168951. The reversal of 2168945 is 5498612.

It is not a de Polignac number, because 2168945 - 2⁸ = 2168689 is a prime.

Its product of digits (17280) is a multiple of the sum of its prime divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27416 + ... + 27494.

It is an arithmetic number, because the mean of its divisors is an integer number (122800).

2^2168945 is an apocalyptic number.

It is an amenable number.

2168945 is a deficient number, since it is larger than the sum of its proper divisors (778255).

2168945 is a wasteful number, since it uses less digits than its factorization.

2168945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 120 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 2168945 is about 1472.7338523983. The cubic root of 2168945 is about 129.4442747079. Note that the first 3 decimals are identical.

It can be divided in two parts, 2168 and 945, that added together give a palindrome (3113).

The spelling of 2168945 in words is "two million, one hundred sixty-eight thousand, nine hundred forty-five".