25251287 has 2 divisors, whose sum is σ = 25251288. Its totient is φ = 25251286.

The previous prime is 25251227. The next prime is 25251301. The reversal of 25251287 is 78215252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25251287 - 2⁶ = 25251223 is a prime.

It is a Chen prime.

It is equal to p_1580576 and since 25251287 and 1580576 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25251227) 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, 12625643 + 12625644.

It is an arithmetic number, because the mean of its divisors is an integer number (12625644).

Almost surely, 2^25251287 is an apocalyptic number.

25251287 is a deficient number, since it is larger than the sum of its proper divisors (1).

25251287 is an equidigital number, since it uses as much as digits as its factorization.

25251287 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 25251287 is about 5025.0658702150. The cubic root of 25251287 is about 293.3781997774.

The spelling of 25251287 in words is "twenty-five million, two hundred fifty-one thousand, two hundred eighty-seven".