2123289 has 12 divisors (see below), whose sum is σ = 3505216. Its totient is φ = 1213272.

The previous prime is 2123281. The next prime is 2123309. The reversal of 2123289 is 9823212.

It is a happy number.

It is not a de Polignac number, because 2123289 - 2³ = 2123281 is a prime.

It is a Duffinian number.

2123289 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16789 + ... + 16914.

2^2123289 is an apocalyptic number.

It is an amenable number.

2123289 is a deficient number, since it is larger than the sum of its proper divisors (1381927).

2123289 is a wasteful number, since it uses less digits than its factorization.

2123289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33716 (or 33713 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2123289 is about 1457.1509873723. The cubic root of 2123289 is about 128.5295646771.

It can be divided in two parts, 21232 and 89, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 2123289 in words is "two million, one hundred twenty-three thousand, two hundred eighty-nine".