25605313 has 2 divisors, whose sum is σ = 25605314. Its totient is φ = 25605312.

The previous prime is 25605311. The next prime is 25605319. The reversal of 25605313 is 31350652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17032129 + 8573184 = 4127^2 + 2928^2 .

It is a cyclic number.

It is not a de Polignac number, because 25605313 - 2¹ = 25605311 is a prime.

Together with 25605311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25605311) 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, 12802656 + 12802657.

It is an arithmetic number, because the mean of its divisors is an integer number (12802657).

Almost surely, 2^25605313 is an apocalyptic number.

It is an amenable number.

25605313 is a deficient number, since it is larger than the sum of its proper divisors (1).

25605313 is an equidigital number, since it uses as much as digits as its factorization.

25605313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 25605313 is about 5060.1692659436. The cubic root of 25605313 is about 294.7429072927.

Adding to 25605313 its reverse (31350652), we get a palindrome (56955965).

The spelling of 25605313 in words is "twenty-five million, six hundred five thousand, three hundred thirteen".