2558999 has 6 divisors (see below), whose sum is σ = 2611056. Its totient is φ = 2507960.

The previous prime is 2558953. The next prime is 2559013. The reversal of 2558999 is 9998552.

It is not a de Polignac number, because 2558999 - 2²⁰ = 1510423 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2354 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (435176).

2^2558999 is an apocalyptic number.

2558999 is a deficient number, since it is larger than the sum of its proper divisors (52057).

2558999 is an frugal number, since it uses more digits than its factorization.

2558999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 964 counting only the distinct ones).

The product of its digits is 291600, while the sum is 47.

The square root of 2558999 is about 1599.6871569154. The cubic root of 2558999 is about 136.7802433480.

The spelling of 2558999 in words is "two million, five hundred fifty-eight thousand, nine hundred ninety-nine".