25764281 has 2 divisors, whose sum is σ = 25764282. Its totient is φ = 25764280.

The previous prime is 25764257. The next prime is 25764287. The reversal of 25764281 is 18246752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16883881 + 8880400 = 4109^2 + 2980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25764281 is a prime.

It is a super-2 number, since 2×25764281² = 1327596350893922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25764287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12882140 + 12882141.

It is an arithmetic number, because the mean of its divisors is an integer number (12882141).

Almost surely, 2^25764281 is an apocalyptic number.

It is an amenable number.

25764281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25764281 is an equidigital number, since it uses as much as digits as its factorization.

25764281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 25764281 is about 5075.8527362405. The cubic root of 25764281 is about 295.3516098609.

The spelling of 25764281 in words is "twenty-five million, seven hundred sixty-four thousand, two hundred eighty-one".