25277281 has 2 divisors, whose sum is σ = 25277282. Its totient is φ = 25277280.

The previous prime is 25277269. The next prime is 25277297. The reversal of 25277281 is 18277252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21013056 + 4264225 = 4584^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 25277281 - 2¹¹ = 25275233 is a prime.

It is a super-2 number, since 2×25277281² = 1277881869505922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25277221) 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, 12638640 + 12638641.

It is an arithmetic number, because the mean of its divisors is an integer number (12638641).

Almost surely, 2^25277281 is an apocalyptic number.

It is an amenable number.

25277281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277281 is an equidigital number, since it uses as much as digits as its factorization.

25277281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 34.

The square root of 25277281 is about 5027.6516386878. The cubic root of 25277281 is about 293.4788343527.

The spelling of 25277281 in words is "twenty-five million, two hundred seventy-seven thousand, two hundred eighty-one".