25864387 has 2 divisors, whose sum is σ = 25864388. Its totient is φ = 25864386.

The previous prime is 25864381. The next prime is 25864393. The reversal of 25864387 is 78346852.

It is a balanced prime because it is at equal distance from previous prime (25864381) and next prime (25864393).

It is a cyclic number.

It is not a de Polignac number, because 25864387 - 2¹⁹ = 25340099 is a prime.

It is not a weakly prime, because it can be changed into another prime (25864381) 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, 12932193 + 12932194.

It is an arithmetic number, because the mean of its divisors is an integer number (12932194).

Almost surely, 2^25864387 is an apocalyptic number.

25864387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864387 is an equidigital number, since it uses as much as digits as its factorization.

25864387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 43.

The square root of 25864387 is about 5085.7041793640. The cubic root of 25864387 is about 295.7336408029.

The spelling of 25864387 in words is "twenty-five million, eight hundred sixty-four thousand, three hundred eighty-seven".