25916257 has 2 divisors, whose sum is σ = 25916258. Its totient is φ = 25916256.

The previous prime is 25916251. The next prime is 25916263. The reversal of 25916257 is 75261952.

It is a balanced prime because it is at equal distance from previous prime (25916251) and next prime (25916263).

It can be written as a sum of positive squares in only one way, i.e., 17673616 + 8242641 = 4204^2 + 2871^2 .

It is a cyclic number.

It is not a de Polignac number, because 25916257 - 2³ = 25916249 is a prime.

It is not a weakly prime, because it can be changed into another prime (25916251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12958128 + 12958129.

It is an arithmetic number, because the mean of its divisors is an integer number (12958129).

Almost surely, 2^25916257 is an apocalyptic number.

It is an amenable number.

25916257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25916257 is an equidigital number, since it uses as much as digits as its factorization.

25916257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 25916257 is about 5090.8012139544. The cubic root of 25916257 is about 295.9312028145.

The spelling of 25916257 in words is "twenty-five million, nine hundred sixteen thousand, two hundred fifty-seven".