25894409 has 2 divisors, whose sum is σ = 25894410. Its totient is φ = 25894408.

The previous prime is 25894399. The next prime is 25894457. The reversal of 25894409 is 90449852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15429184 + 10465225 = 3928^2 + 3235^2 .

It is a cyclic number.

It is not a de Polignac number, because 25894409 - 2⁸ = 25894153 is a prime.

It is not a weakly prime, because it can be changed into another prime (25894469) 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, 12947204 + 12947205.

It is an arithmetic number, because the mean of its divisors is an integer number (12947205).

Almost surely, 2^25894409 is an apocalyptic number.

It is an amenable number.

25894409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25894409 is an equidigital number, since it uses as much as digits as its factorization.

25894409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 25894409 is about 5088.6549303328. The cubic root of 25894409 is about 295.8480205012.

The spelling of 25894409 in words is "twenty-five million, eight hundred ninety-four thousand, four hundred nine".