2558689 has 4 divisors (see below), whose sum is σ = 2924224. Its totient is φ = 2193156.

The previous prime is 2558683. The next prime is 2558701. The reversal of 2558689 is 9868552.

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 not a de Polignac number, because 2558689 - 2¹¹ = 2556641 is a prime.

It is an Ulam number.

It is a Duffinian number.

2558689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2558683) 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, 182757 + ... + 182770.

It is an arithmetic number, because the mean of its divisors is an integer number (731056).

2^2558689 is an apocalyptic number.

It is an amenable number.

2558689 is a deficient number, since it is larger than the sum of its proper divisors (365535).

2558689 is an equidigital number, since it uses as much as digits as its factorization.

2558689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365534.

The product of its digits is 172800, while the sum is 43.

The square root of 2558689 is about 1599.5902600354. The cubic root of 2558689 is about 136.7747198877.

The spelling of 2558689 in words is "two million, five hundred fifty-eight thousand, six hundred eighty-nine".