25138747 has 4 divisors (see below), whose sum is σ = 26231760. Its totient is φ = 24045736.

The previous prime is 25138739. The next prime is 25138753. The reversal of 25138747 is 74783152.

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 25138747 - 2³ = 25138739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25138727) 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, 546472 + ... + 546517.

It is an arithmetic number, because the mean of its divisors is an integer number (6557940).

Almost surely, 2^25138747 is an apocalyptic number.

25138747 is a deficient number, since it is larger than the sum of its proper divisors (1093013).

25138747 is a wasteful number, since it uses less digits than its factorization.

25138747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093012.

The product of its digits is 47040, while the sum is 37.

The square root of 25138747 is about 5013.8555025050. The cubic root of 25138747 is about 292.9417077791.

The spelling of 25138747 in words is "twenty-five million, one hundred thirty-eight thousand, seven hundred forty-seven".