25135423 has 4 divisors (see below), whose sum is σ = 26458360. Its totient is φ = 23812488.

The previous prime is 25135417. The next prime is 25135441. The reversal of 25135423 is 32453152.

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

It is a cyclic number.

It is not a de Polignac number, because 25135423 - 2⁹ = 25134911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25135403) 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 3 ways as a sum of consecutive naturals, for example, 661440 + ... + 661477.

It is an arithmetic number, because the mean of its divisors is an integer number (6614590).

Almost surely, 2^25135423 is an apocalyptic number.

25135423 is a deficient number, since it is larger than the sum of its proper divisors (1322937).

25135423 is a wasteful number, since it uses less digits than its factorization.

25135423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322936.

The product of its digits is 3600, while the sum is 25.

The square root of 25135423 is about 5013.5240101150. The cubic root of 25135423 is about 292.9287956908.

Adding to 25135423 its reverse (32453152), we get a palindrome (57588575).

The spelling of 25135423 in words is "twenty-five million, one hundred thirty-five thousand, four hundred twenty-three".