2125689 has 4 divisors (see below), whose sum is σ = 2834256. Its totient is φ = 1417124.

The previous prime is 2125681. The next prime is 2125691. The reversal of 2125689 is 9865212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125689 - 2³ = 2125681 is a prime.

It is a D-number.

2125689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2125681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354279 + ... + 354284.

It is an arithmetic number, because the mean of its divisors is an integer number (708564).

2^2125689 is an apocalyptic number.

It is an amenable number.

2125689 is a deficient number, since it is larger than the sum of its proper divisors (708567).

2125689 is an equidigital number, since it uses as much as digits as its factorization.

2125689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708566.

The product of its digits is 8640, while the sum is 33.

The square root of 2125689 is about 1457.9742796085. The cubic root of 2125689 is about 128.5779730355.

The spelling of 2125689 in words is "two million, one hundred twenty-five thousand, six hundred eighty-nine".