25864507 has 2 divisors, whose sum is σ = 25864508. Its totient is φ = 25864506.

The previous prime is 25864499. The next prime is 25864513. The reversal of 25864507 is 70546852.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25864507 - 2³ = 25864499 is a prime.

It is not a weakly prime, because it can be changed into another prime (25864537) 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, 12932253 + 12932254.

It is an arithmetic number, because the mean of its divisors is an integer number (12932254).

Almost surely, 2^25864507 is an apocalyptic number.

25864507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864507 is an equidigital number, since it uses as much as digits as its factorization.

25864507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 25864507 is about 5085.7159771265. The cubic root of 25864507 is about 295.7340981626.

The spelling of 25864507 in words is "twenty-five million, eight hundred sixty-four thousand, five hundred seven".