25243136 has 40 divisors (see below), whose sum is σ = 51559200. Its totient is φ = 12341248.

The previous prime is 25243129. The next prime is 25243151. The reversal of 25243136 is 63134252.

It is a super-2 number, since 2×25243136² = 1274431830228992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 23540 + ... + 24588.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^25243136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779600).

25243136 is an abundant number, since it is smaller than the sum of its proper divisors (26316064).

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

25243136 is an equidigital number, since it uses as much as digits as its factorization.

25243136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1098 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 25243136 is about 5024.2547706103. The cubic root of 25243136 is about 293.3466293330.

Adding to 25243136 its reverse (63134252), we get a palindrome (88377388).

The spelling of 25243136 in words is "twenty-five million, two hundred forty-three thousand, one hundred thirty-six".