25426 has 4 divisors (see below), whose sum is σ = 38142. Its totient is φ = 12712.

The previous prime is 25423. The next prime is 25439. The reversal of 25426 is 62452.

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

It can be written as a sum of positive squares in only one way, i.e., 15625 + 9801 = 125^2 + 99^2 .

It is a pancake number, because a pancake can be divided into 25426 parts by 225 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (25423) 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 as a sum of consecutive naturals, namely, 6355 + ... + 6358.

2²⁵⁴²⁶ is an apocalyptic number.

25426 is a deficient number, since it is larger than the sum of its proper divisors (12716).

25426 is a wasteful number, since it uses less digits than its factorization.

25426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12715.

The product of its digits is 480, while the sum is 19.

The square root of 25426 is about 159.4553228964. The cubic root of 25426 is about 29.4053270616.

Adding to 25426 its reverse (62452), we get a palindrome (87878).

The spelling of 25426 in words is "twenty-five thousand, four hundred twenty-six".