25434 has 20 divisors (see below), whose sum is σ = 57354. Its totient is φ = 8424.

The previous prime is 25423. The next prime is 25439. The reversal of 25434 is 43452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23409 + 2025 = 153^2 + 45^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 2¹³ + 5³ + 4 + 3⁶ + 4⁷ .

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25434.

It is not an unprimeable number, because it can be changed into a prime (25439) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84 + ... + 240.

2²⁵⁴³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28677).

25434 is an abundant number, since it is smaller than the sum of its proper divisors (31920).

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

25434 is a wasteful number, since it uses less digits than its factorization.

25434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 162 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 25434 is about 159.4804063200. The cubic root of 25434 is about 29.4084107548.

Adding to 25434 its sum of digits (18), we get a palindrome (25452).

Adding to 25434 its reverse (43452), we get a palindrome (68886).

The spelling of 25434 in words is "twenty-five thousand, four hundred thirty-four".