2139172 has 24 divisors (see below), whose sum is σ = 4504640. Its totient is φ = 868320.

The previous prime is 2139167. The next prime is 2139199. The reversal of 2139172 is 2719312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479 + ... + 2542.

2^2139172 is an apocalyptic number.

It is an amenable number.

2139172 is an abundant number, since it is smaller than the sum of its proper divisors (2365468).

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

2139172 is a wasteful number, since it uses less digits than its factorization.

2139172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051 (or 4049 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 2139172 is about 1462.5908518790. The cubic root of 2139172 is about 128.8492520255.

It can be divided in two parts, 21 and 39172, that added together give a palindrome (39193).

The spelling of 2139172 in words is "two million, one hundred thirty-nine thousand, one hundred seventy-two".