25135142 has 4 divisors (see below), whose sum is σ = 37702716. Its totient is φ = 12567570.

The previous prime is 25135133. The next prime is 25135153. The reversal of 25135142 is 24153152.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 6283784 + ... + 6283787.

It is an arithmetic number, because the mean of its divisors is an integer number (9425679).

Almost surely, 2^25135142 is an apocalyptic number.

25135142 is a deficient number, since it is larger than the sum of its proper divisors (12567574).

25135142 is a wasteful number, since it uses less digits than its factorization.

25135142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12567573.

The product of its digits is 1200, while the sum is 23.

The square root of 25135142 is about 5013.4959858366. The cubic root of 25135142 is about 292.9277040933.

Adding to 25135142 its reverse (24153152), we get a palindrome (49288294).

The spelling of 25135142 in words is "twenty-five million, one hundred thirty-five thousand, one hundred forty-two".