25804001 has 2 divisors, whose sum is σ = 25804002. Its totient is φ = 25804000.

The previous prime is 25803991. The next prime is 25804003. The reversal of 25804001 is 10040852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 8994001 = 4100^2 + 2999^2 .

It is a cyclic number.

It is not a de Polignac number, because 25804001 - 2¹⁰ = 25802977 is a prime.

It is a Sophie Germain prime.

Together with 25804003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25804003) 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, 12902000 + 12902001.

It is an arithmetic number, because the mean of its divisors is an integer number (12902001).

Almost surely, 2^25804001 is an apocalyptic number.

It is an amenable number.

25804001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804001 is an equidigital number, since it uses as much as digits as its factorization.

25804001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 25804001 is about 5079.7638724649. The cubic root of 25804001 is about 295.5033100962.

Adding to 25804001 its reverse (10040852), we get a palindrome (35844853).

The spelling of 25804001 in words is "twenty-five million, eight hundred four thousand, one".