25134247 has 4 divisors (see below), whose sum is σ = 25157200. Its totient is φ = 25111296.

The previous prime is 25134233. The next prime is 25134253. The reversal of 25134247 is 74243152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25134247 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 (25134217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9747 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (6289300).

Almost surely, 2^25134247 is an apocalyptic number.

25134247 is a deficient number, since it is larger than the sum of its proper divisors (22953).

25134247 is a wasteful number, since it uses less digits than its factorization.

25134247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22952.

The product of its digits is 6720, while the sum is 28.

The square root of 25134247 is about 5013.4067259699. The cubic root of 25134247 is about 292.9242272426.

Adding to 25134247 its reverse (74243152), we get a palindrome (99377399).

The spelling of 25134247 in words is "twenty-five million, one hundred thirty-four thousand, two hundred forty-seven".