25205867 has 2 divisors, whose sum is σ = 25205868. Its totient is φ = 25205866.

The previous prime is 25205809. The next prime is 25205881. The reversal of 25205867 is 76850252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25205867 - 2¹⁰ = 25204843 is a prime.

It is not a weakly prime, because it can be changed into another prime (25201867) 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, 12602933 + 12602934.

It is an arithmetic number, because the mean of its divisors is an integer number (12602934).

Almost surely, 2^25205867 is an apocalyptic number.

25205867 is a deficient number, since it is larger than the sum of its proper divisors (1).

25205867 is an equidigital number, since it uses as much as digits as its factorization.

25205867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 25205867 is about 5020.5444923833. The cubic root of 25205867 is about 293.2021924412.

The spelling of 25205867 in words is "twenty-five million, two hundred five thousand, eight hundred sixty-seven".