25678 has 8 divisors (see below), whose sum is σ = 39672. Its totient is φ = 12456.

The previous prime is 25673. The next prime is 25679. The reversal of 25678 is 87652.

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

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

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 (25673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100 + ... + 247.

It is an arithmetic number, because the mean of its divisors is an integer number (4959).

2²⁵⁶⁷⁸ is an apocalyptic number.

25678 is a deficient number, since it is larger than the sum of its proper divisors (13994).

25678 is a wasteful number, since it uses less digits than its factorization.

25678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 3360, while the sum is 28.

The square root of 25678 is about 160.2435646134. The cubic root of 25678 is about 29.5021543959.

It can be divided in two parts, 25 and 678, that added together give a triangular number (703 = T₃₇).

The spelling of 25678 in words is "twenty-five thousand, six hundred seventy-eight".