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25422 = 2319223

25422 has 16 divisors (see below), whose sum is σ = 53760. Its totient is φ = 7992.

The previous prime is 25411. The next prime is 25423. The reversal of 25422 is 22452.

25422 is nontrivially palindromic in base 8.

25422 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25422.

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

25422 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 in 7 ways as a sum of consecutive naturals, for example, 3 + ... + 225.

It is an arithmetic number, because the mean of its divisors is an integer number (3360).

225422 is an apocalyptic number.

25422 is an abundant number, since it is smaller than the sum of its proper divisors (28338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26880).

25422 is a wasteful number, since it uses less digits than its factorization.

25422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 160, while the sum is 15.

The square root of 25422 is about 159.4427797048. The cubic root of 25422 is about 29.4037849725.

Adding to 25422 its reverse (22452), we get a palindrome (47874).

It can be divided in two parts, 254 and 22, that added together give a triangular number (276 = T23).

The spelling of 25422 in words is "twenty-five thousand, four hundred twenty-two".

Divisors: 1 2 3 6 19 38 57 114 223 446 669 1338 4237 8474 12711 25422