2558723 has 4 divisors (see below), whose sum is σ = 2593848. Its totient is φ = 2523600.

The previous prime is 2558719. The next prime is 2558729. The reversal of 2558723 is 3278552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2558723 - 2² = 2558719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2558723.

It is not an unprimeable number, because it can be changed into a prime (2558729) 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, 17453 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (648462).

2^2558723 is an apocalyptic number.

2558723 is a deficient number, since it is larger than the sum of its proper divisors (35125).

2558723 is an equidigital number, since it uses as much as digits as its factorization.

2558723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35124.

The product of its digits is 16800, while the sum is 32.

The square root of 2558723 is about 1599.6008877217. The cubic root of 2558723 is about 136.7753257084.

The spelling of 2558723 in words is "two million, five hundred fifty-eight thousand, seven hundred twenty-three".