25136542 has 16 divisors (see below), whose sum is σ = 39034512. Its totient is φ = 12130560.

The previous prime is 25136521. The next prime is 25136543. The reversal of 25136542 is 24563152.

It is a self number, because there is not a number n which added to its sum of digits gives 25136542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25136543) 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, 8398 + ... + 10990.

It is an arithmetic number, because the mean of its divisors is an integer number (2439657).

Almost surely, 2^25136542 is an apocalyptic number.

25136542 is a deficient number, since it is larger than the sum of its proper divisors (13897970).

25136542 is a wasteful number, since it uses less digits than its factorization.

25136542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763.

The product of its digits is 7200, while the sum is 28.

The square root of 25136542 is about 5013.6356070221. The cubic root of 25136542 is about 292.9331425769.

Adding to 25136542 its reverse (24563152), we get a palindrome (49699694).

The spelling of 25136542 in words is "twenty-five million, one hundred thirty-six thousand, five hundred forty-two".