25725281 has 2 divisors, whose sum is σ = 25725282. Its totient is φ = 25725280.

The previous prime is 25725251. The next prime is 25725283. The reversal of 25725281 is 18252752.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25411681 + 313600 = 5041^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 25725281 - 2¹⁴ = 25708897 is a prime.

It is a super-2 number, since 2×25725281² = 1323580165057922, which contains 22 as substring.

Together with 25725283, 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 (25725283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12862640 + 12862641.

It is an arithmetic number, because the mean of its divisors is an integer number (12862641).

Almost surely, 2^25725281 is an apocalyptic number.

It is an amenable number.

25725281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25725281 is an equidigital number, since it uses as much as digits as its factorization.

25725281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 25725281 is about 5072.0095622938. The cubic root of 25725281 is about 295.2025077024.

The spelling of 25725281 in words is "twenty-five million, seven hundred twenty-five thousand, two hundred eighty-one".