25687542 has 16 divisors (see below), whose sum is σ = 51431472. Its totient is φ = 8553120.

The previous prime is 25687531. The next prime is 25687549. The reversal of 25687542 is 24578652.

It is a self number, because there is not a number n which added to its sum of digits gives 25687542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25687549) 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 7 ways as a sum of consecutive naturals, for example, 5692 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (3214467).

Almost surely, 2^25687542 is an apocalyptic number.

25687542 is an abundant number, since it is smaller than the sum of its proper divisors (25743930).

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

25687542 is a wasteful number, since it uses less digits than its factorization.

25687542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703.

The product of its digits is 134400, while the sum is 39.

The square root of 25687542 is about 5068.2878765911. The cubic root of 25687542 is about 295.0580829805.

The spelling of 25687542 in words is "twenty-five million, six hundred eighty-seven thousand, five hundred forty-two".