25321187 has 2 divisors, whose sum is σ = 25321188. Its totient is φ = 25321186.

The previous prime is 25321181. The next prime is 25321201. The reversal of 25321187 is 78112352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25321187 - 2⁸ = 25320931 is a prime.

It is a super-2 number, since 2×25321187² = 1282325022177938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25321181) 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, 12660593 + 12660594.

It is an arithmetic number, because the mean of its divisors is an integer number (12660594).

Almost surely, 2^25321187 is an apocalyptic number.

25321187 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321187 is an equidigital number, since it uses as much as digits as its factorization.

25321187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 25321187 is about 5032.0161963173. The cubic root of 25321187 is about 293.6486578437.

The spelling of 25321187 in words is "twenty-five million, three hundred twenty-one thousand, one hundred eighty-seven".