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2558 = 21279
BaseRepresentation
bin100111111110
310111202
4213332
540213
615502
710313
oct4776
93452
102558
111a16
121592
13121a
14d0a
15b58
hex9fe

2558 has 4 divisors (see below), whose sum is σ = 3840. Its totient is φ = 1278.

The previous prime is 2557. The next prime is 2579. The reversal of 2558 is 8552.

2558 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

2558 is strictly pandigital in base 5.

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 (2551) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (960).

2558 is a deficient number, since it is larger than the sum of its proper divisors (1282).

2558 is a wasteful number, since it uses less digits than its factorization.

2558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its digits is 400, while the sum is 20.

The square root of 2558 is about 50.5766744656. The cubic root of 2558 is about 13.6762441954.

The spelling of 2558 in words is "two thousand, five hundred fifty-eight".

Divisors: 1 2 1279 2558