2139166 has 4 divisors (see below), whose sum is σ = 3208752. Its totient is φ = 1069582.

The previous prime is 2139157. The next prime is 2139167. The reversal of 2139166 is 6619312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534790 + ... + 534793.

It is an arithmetic number, because the mean of its divisors is an integer number (802188).

2^2139166 is an apocalyptic number.

2139166 is a deficient number, since it is larger than the sum of its proper divisors (1069586).

2139166 is a wasteful number, since it uses less digits than its factorization.

2139166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069585.

The product of its digits is 1944, while the sum is 28.

The square root of 2139166 is about 1462.5888007229. The cubic root of 2139166 is about 128.8491315589.

The spelling of 2139166 in words is "two million, one hundred thirty-nine thousand, one hundred sixty-six".