25382561 has 2 divisors, whose sum is σ = 25382562. Its totient is φ = 25382560.

The previous prime is 25382557. The next prime is 25382573. The reversal of 25382561 is 16528352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23464336 + 1918225 = 4844^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 25382561 - 2² = 25382557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25382531) 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, 12691280 + 12691281.

It is an arithmetic number, because the mean of its divisors is an integer number (12691281).

Almost surely, 2^25382561 is an apocalyptic number.

It is an amenable number.

25382561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25382561 is an equidigital number, since it uses as much as digits as its factorization.

25382561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 25382561 is about 5038.1108562635. The cubic root of 25382561 is about 293.8857169159.

The spelling of 25382561 in words is "twenty-five million, three hundred eighty-two thousand, five hundred sixty-one".