2166239 has 8 divisors (see below), whose sum is σ = 2247168. Its totient is φ = 2086560.

The previous prime is 2166233. The next prime is 2166251. The reversal of 2166239 is 9326612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166233) 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, 4469 + ... + 4929.

It is an arithmetic number, because the mean of its divisors is an integer number (280896).

2^2166239 is an apocalyptic number.

2166239 is a deficient number, since it is larger than the sum of its proper divisors (80929).

2166239 is a wasteful number, since it uses less digits than its factorization.

2166239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625.

The product of its digits is 3888, while the sum is 29.

The square root of 2166239 is about 1471.8148660752. The cubic root of 2166239 is about 129.3904202644.

The spelling of 2166239 in words is "two million, one hundred sixty-six thousand, two hundred thirty-nine".