25688542 has 24 divisors (see below), whose sum is σ = 42814296. Its totient is φ = 11550000.

The previous prime is 25688521. The next prime is 25688549. The reversal of 25688542 is 24588652.

It is a junction number, because it is equal to n+sod(n) for n = 25688495 and 25688504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25688549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23917 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (1783929).

Almost surely, 2^25688542 is an apocalyptic number.

25688542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25688542 is a deficient number, since it is larger than the sum of its proper divisors (17125754).

25688542 is a wasteful number, since it uses less digits than its factorization.

25688542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 1165 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 25688542 is about 5068.3865282750. The cubic root of 25688542 is about 295.0619117399.

The spelling of 25688542 in words is "twenty-five million, six hundred eighty-eight thousand, five hundred forty-two".