25306140 has 48 divisors (see below), whose sum is σ = 71084160. Its totient is φ = 6726720.

The previous prime is 25306139. The next prime is 25306159. The reversal of 25306140 is 4160352.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29031 + ... + 29889.

It is an arithmetic number, because the mean of its divisors is an integer number (1480920).

Almost surely, 2^25306140 is an apocalyptic number.

25306140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25306140 is an abundant number, since it is smaller than the sum of its proper divisors (45778020).

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

25306140 is a wasteful number, since it uses less digits than its factorization.

25306140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 25306140 is about 5030.5208477850. The cubic root of 25306140 is about 293.5904798592.

Adding to 25306140 its reverse (4160352), we get a palindrome (29466492).

The spelling of 25306140 in words is "twenty-five million, three hundred six thousand, one hundred forty".