25975217 has 2 divisors, whose sum is σ = 25975218. Its totient is φ = 25975216.

The previous prime is 25975199. The next prime is 25975219. The reversal of 25975217 is 71257952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25391521 + 583696 = 5039^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 25975217 - 2⁸ = 25974961 is a prime.

Together with 25975219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25975219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12987608 + 12987609.

It is an arithmetic number, because the mean of its divisors is an integer number (12987609).

Almost surely, 2^25975217 is an apocalyptic number.

It is an amenable number.

25975217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25975217 is an equidigital number, since it uses as much as digits as its factorization.

25975217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 25975217 is about 5096.5887611225. The cubic root of 25975217 is about 296.1554493022.

The spelling of 25975217 in words is "twenty-five million, nine hundred seventy-five thousand, two hundred seventeen".