25427 has 4 divisors (see below), whose sum is σ = 26016. Its totient is φ = 24840.

The previous prime is 25423. The next prime is 25439. The reversal of 25427 is 72452.

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

It is a cyclic number.

It is not a de Polignac number, because 25427 - 2² = 25423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25399 and 25408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25427.

It is not an unprimeable number, because it can be changed into a prime (25423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 317.

It is an arithmetic number, because the mean of its divisors is an integer number (6504).

2²⁵⁴²⁷ is an apocalyptic number.

25427 is a deficient number, since it is larger than the sum of its proper divisors (589).

25427 is an equidigital number, since it uses as much as digits as its factorization.

25427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 560, while the sum is 20.

The square root of 25427 is about 159.4584585401. The cubic root of 25427 is about 29.4057125586.

Adding to 25427 its reverse (72452), we get a palindrome (97879).

The spelling of 25427 in words is "twenty-five thousand, four hundred twenty-seven".