25805413 has 2 divisors, whose sum is σ = 25805414. Its totient is φ = 25805412.

The previous prime is 25805411. The next prime is 25805431. The reversal of 25805413 is 31450852.

Together with next prime (25805431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22297284 + 3508129 = 4722^2 + 1873^2 .

It is a cyclic number.

It is not a de Polignac number, because 25805413 - 2¹ = 25805411 is a prime.

Together with 25805411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25805411) 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, 12902706 + 12902707.

It is an arithmetic number, because the mean of its divisors is an integer number (12902707).

Almost surely, 2^25805413 is an apocalyptic number.

It is an amenable number.

25805413 is a deficient number, since it is larger than the sum of its proper divisors (1).

25805413 is an equidigital number, since it uses as much as digits as its factorization.

25805413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 25805413 is about 5079.9028534018. The cubic root of 25805413 is about 295.5086999976.

The spelling of 25805413 in words is "twenty-five million, eight hundred five thousand, four hundred thirteen".