25840134 has 56 divisors (see below), whose sum is σ = 59808960. Its totient is φ = 8363088.

The previous prime is 25840117. The next prime is 25840163. The reversal of 25840134 is 43104852.

25840134 is a `hidden beast` number, since 258 + 401 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25840098 and 25840107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 53707 + ... + 54185.

Almost surely, 2^25840134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25840134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29904480).

25840134 is an abundant number, since it is smaller than the sum of its proper divisors (33968826).

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

25840134 is an equidigital number, since it uses as much as digits as its factorization.

25840134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 25840134 is about 5083.3191912372. The cubic root of 25840134 is about 295.6411755531.

Adding to 25840134 its reverse (43104852), we get a palindrome (68944986).

The spelling of 25840134 in words is "twenty-five million, eight hundred forty thousand, one hundred thirty-four".