25821116 has 12 divisors (see below), whose sum is σ = 46408488. Its totient is φ = 12561552.

The previous prime is 25821101. The next prime is 25821127. The reversal of 25821116 is 61112852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87086 + ... + 87381.

It is an arithmetic number, because the mean of its divisors is an integer number (3867374).

Almost surely, 2^25821116 is an apocalyptic number.

It is an amenable number.

25821116 is a deficient number, since it is larger than the sum of its proper divisors (20587372).

25821116 is a wasteful number, since it uses less digits than its factorization.

25821116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174508 (or 174506 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 25821116 is about 5081.4482187660. The cubic root of 25821116 is about 295.5686284086.

Adding to 25821116 its reverse (61112852), we get a palindrome (86933968).

The spelling of 25821116 in words is "twenty-five million, eight hundred twenty-one thousand, one hundred sixteen".