25172747 has 2 divisors, whose sum is σ = 25172748. Its totient is φ = 25172746.

The previous prime is 25172743. The next prime is 25172789. The reversal of 25172747 is 74727152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25172747 - 2² = 25172743 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25172743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12586373 + 12586374.

It is an arithmetic number, because the mean of its divisors is an integer number (12586374).

Almost surely, 2^25172747 is an apocalyptic number.

25172747 is a deficient number, since it is larger than the sum of its proper divisors (1).

25172747 is an equidigital number, since it uses as much as digits as its factorization.

25172747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 35.

The square root of 25172747 is about 5017.2449611316. The cubic root of 25172747 is about 293.0737155670.

Adding to 25172747 its reverse (74727152), we get a palindrome (99899899).

The spelling of 25172747 in words is "twenty-five million, one hundred seventy-two thousand, seven hundred forty-seven".