25135745 has 4 divisors (see below), whose sum is σ = 30162900. Its totient is φ = 20108592.

The previous prime is 25135723. The next prime is 25135751. The reversal of 25135745 is 54753152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 21464689 = 1916^2 + 4633^2 .

It is a cyclic number.

It is not a de Polignac number, because 25135745 - 2⁶ = 25135681 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513570 + ... + 2513579.

It is an arithmetic number, because the mean of its divisors is an integer number (7540725).

Almost surely, 2^25135745 is an apocalyptic number.

It is an amenable number.

25135745 is a deficient number, since it is larger than the sum of its proper divisors (5027155).

25135745 is an equidigital number, since it uses as much as digits as its factorization.

25135745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027154.

The product of its digits is 21000, while the sum is 32.

The square root of 25135745 is about 5013.5561231525. The cubic root of 25135745 is about 292.9300465506.

Adding to 25135745 its reverse (54753152), we get a palindrome (79888897).

The spelling of 25135745 in words is "twenty-five million, one hundred thirty-five thousand, seven hundred forty-five".