25606 has 16 divisors (see below), whose sum is σ = 46080. Its totient is φ = 10440.

The previous prime is 25603. The next prime is 25609. The reversal of 25606 is 60652.

25606 = T₂₈ + T₂₉ + ... + T₅₅.

It is an interprime number because it is at equal distance from previous prime (25603) and next prime (25609).

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 405 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (2880).

2²⁵⁶⁰⁶ is an apocalyptic number.

25606 is a deficient number, since it is larger than the sum of its proper divisors (20474).

25606 is a wasteful number, since it uses less digits than its factorization.

25606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 25606 is about 160.0187489015. The cubic root of 25606 is about 29.4745543289.

The spelling of 25606 in words is "twenty-five thousand, six hundred six".