25775149 has 2 divisors, whose sum is σ = 25775150. Its totient is φ = 25775148.

The previous prime is 25775147. The next prime is 25775173. The reversal of 25775149 is 94157752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 3515625 = 4718^2 + 1875^2 .

It is a cyclic number.

It is not a de Polignac number, because 25775149 - 2¹ = 25775147 is a prime.

Together with 25775147, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25775143) 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, 12887574 + 12887575.

It is an arithmetic number, because the mean of its divisors is an integer number (12887575).

Almost surely, 2^25775149 is an apocalyptic number.

It is an amenable number.

25775149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25775149 is an equidigital number, since it uses as much as digits as its factorization.

25775149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 40.

The square root of 25775149 is about 5076.9231824009. The cubic root of 25775149 is about 295.3931328524.

The spelling of 25775149 in words is "twenty-five million, seven hundred seventy-five thousand, one hundred forty-nine".