25716017 has 2 divisors, whose sum is σ = 25716018. Its totient is φ = 25716016.

The previous prime is 25715983. The next prime is 25716023. The reversal of 25716017 is 71061752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25563136 + 152881 = 5056^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 25716017 - 2¹⁸ = 25453873 is a prime.

It is a super-2 number, since 2×25716017² = 1322627060688578, which contains 22 as substring.

It is equal to p_1607843 and since 25716017 and 1607843 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25716617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12858008 + 12858009.

It is an arithmetic number, because the mean of its divisors is an integer number (12858009).

Almost surely, 2^25716017 is an apocalyptic number.

It is an amenable number.

25716017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25716017 is an equidigital number, since it uses as much as digits as its factorization.

25716017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 25716017 is about 5071.0962325714. The cubic root of 25716017 is about 295.1670680588.

Adding to 25716017 its reverse (71061752), we get a palindrome (96777769).

The spelling of 25716017 in words is "twenty-five million, seven hundred sixteen thousand, seventeen".