25006 has 4 divisors (see below), whose sum is σ = 37512. Its totient is φ = 12502.

The previous prime is 24989. The next prime is 25013. The reversal of 25006 is 60052.

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

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

25006 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (9378).

2²⁵⁰⁰⁶ is an apocalyptic number.

25006 is a deficient number, since it is larger than the sum of its proper divisors (12506).

25006 is a wasteful number, since it uses less digits than its factorization.

25006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12505.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 25006 is about 158.1328555361. The cubic root of 25006 is about 29.2425164092.

Adding to 25006 its reverse (60052), we get a palindrome (85058).

The spelling of 25006 in words is "twenty-five thousand, six".