2166039 has 24 divisors (see below), whose sum is σ = 3329040. Its totient is φ = 1354752.

The previous prime is 2166029. The next prime is 2166041. The reversal of 2166039 is 9306612.

It is a happy number.

It is not a de Polignac number, because 2166039 - 2⁴ = 2166023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11127 + ... + 11319.

It is an arithmetic number, because the mean of its divisors is an integer number (138710).

2^2166039 is an apocalyptic number.

2166039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2166039 is a deficient number, since it is larger than the sum of its proper divisors (1163001).

2166039 is a wasteful number, since it uses less digits than its factorization.

2166039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2166039 is about 1471.7469211790. The cubic root of 2166039 is about 129.3864381122.

It can be divided in two parts, 216603 and 9, that added together give a palindrome (216612).

The spelling of 2166039 in words is "two million, one hundred sixty-six thousand, thirty-nine".