25858 has 8 divisors (see below), whose sum is σ = 44352. Its totient is φ = 11076.

The previous prime is 25849. The next prime is 25867. The reversal of 25858 is 85852.

It is an interprime number because it is at equal distance from previous prime (25849) and next prime (25867).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (5544).

2²⁵⁸⁵⁸ is an apocalyptic number.

25858 is a deficient number, since it is larger than the sum of its proper divisors (18494).

25858 is a wasteful number, since it uses less digits than its factorization.

25858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its digits is 3200, while the sum is 28.

The square root of 25858 is about 160.8042288001. The cubic root of 25858 is about 29.5709295793.

The spelling of 25858 in words is "twenty-five thousand, eight hundred fifty-eight".