25537849 has 2 divisors, whose sum is σ = 25537850. Its totient is φ = 25537848.

The previous prime is 25537847. The next prime is 25537861. The reversal of 25537849 is 94873552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 186624 = 5035^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 25537849 - 2¹ = 25537847 is a prime.

Together with 25537847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25537847) 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, 12768924 + 12768925.

It is an arithmetic number, because the mean of its divisors is an integer number (12768925).

Almost surely, 2^25537849 is an apocalyptic number.

It is an amenable number.

25537849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25537849 is an equidigital number, since it uses as much as digits as its factorization.

25537849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 43.

The square root of 25537849 is about 5053.4986890272. The cubic root of 25537849 is about 294.4838201155.

The spelling of 25537849 in words is "twenty-five million, five hundred thirty-seven thousand, eight hundred forty-nine".