25672217 has 2 divisors, whose sum is σ = 25672218. Its totient is φ = 25672216.

The previous prime is 25672183. The next prime is 25672243. The reversal of 25672217 is 71227652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22886656 + 2785561 = 4784^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 25672217 - 2²² = 21477913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25672267) by changing a digit.

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, 12836108 + 12836109.

It is an arithmetic number, because the mean of its divisors is an integer number (12836109).

Almost surely, 2^25672217 is an apocalyptic number.

It is an amenable number.

25672217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25672217 is an equidigital number, since it uses as much as digits as its factorization.

25672217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 25672217 is about 5066.7757992633. The cubic root of 25672217 is about 294.9993948087. Note that the first 3 decimals are identical.

Adding to 25672217 its reverse (71227652), we get a palindrome (96899869).

The spelling of 25672217 in words is "twenty-five million, six hundred seventy-two thousand, two hundred seventeen".