25794221 has 4 divisors (see below), whose sum is σ = 25817244. Its totient is φ = 25771200.

The previous prime is 25794163. The next prime is 25794227. The reversal of 25794221 is 12249752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9302500 + 16491721 = 3050^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 25794221 - 2⁶ = 25794157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25794227) 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 in 3 ways as a sum of consecutive naturals, for example, 9740 + ... + 12101.

It is an arithmetic number, because the mean of its divisors is an integer number (6454311).

Almost surely, 2^25794221 is an apocalyptic number.

It is an amenable number.

25794221 is a deficient number, since it is larger than the sum of its proper divisors (23023).

25794221 is a wasteful number, since it uses less digits than its factorization.

25794221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23022.

The product of its digits is 10080, while the sum is 32.

The square root of 25794221 is about 5078.8011380640. The cubic root of 25794221 is about 295.4659723778.

The spelling of 25794221 in words is "twenty-five million, seven hundred ninety-four thousand, two hundred twenty-one".