2556558 has 12 divisors (see below), whose sum is σ = 5539248. Its totient is φ = 852180.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556558 is 8556552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556559) 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, 70998 + ... + 71033.

It is an arithmetic number, because the mean of its divisors is an integer number (461604).

2^2556558 is an apocalyptic number.

2556558 is an abundant number, since it is smaller than the sum of its proper divisors (2982690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556558 is a wasteful number, since it uses less digits than its factorization.

2556558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142039 (or 142036 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 2556558 is about 1598.9240132039. The cubic root of 2556558 is about 136.7367384734.

The spelling of 2556558 in words is "two million, five hundred fifty-six thousand, five hundred fifty-eight".