25465009 has 2 divisors, whose sum is σ = 25465010. Its totient is φ = 25465008.

The previous prime is 25464983. The next prime is 25465019. The reversal of 25465009 is 90056452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 9941409 = 3940^2 + 3153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25465009 is a prime.

It is not a weakly prime, because it can be changed into another prime (25465019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732504 + 12732505.

It is an arithmetic number, because the mean of its divisors is an integer number (12732505).

Almost surely, 2^25465009 is an apocalyptic number.

It is an amenable number.

25465009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25465009 is an equidigital number, since it uses as much as digits as its factorization.

25465009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25465009 is about 5046.2866545610. The cubic root of 25465009 is about 294.2035742796.

The spelling of 25465009 in words is "twenty-five million, four hundred sixty-five thousand, nine".