2545689 has 12 divisors (see below), whose sum is σ = 3511248. Its totient is φ = 1640520.

The previous prime is 2545687. The next prime is 2545691. The reversal of 2545689 is 9865452.

It is an interprime number because it is at equal distance from previous prime (2545687) and next prime (2545691).

It is not a de Polignac number, because 2545689 - 2¹ = 2545687 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2545681) 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, 2442 + ... + 3324.

It is an arithmetic number, because the mean of its divisors is an integer number (292604).

2^2545689 is an apocalyptic number.

It is an amenable number.

2545689 is a deficient number, since it is larger than the sum of its proper divisors (965559).

2545689 is an equidigital number, since it uses as much as digits as its factorization.

2545689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 917 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 2545689 is about 1595.5215448248. The cubic root of 2545689 is about 136.5426881473.

The spelling of 2545689 in words is "two million, five hundred forty-five thousand, six hundred eighty-nine".