11825991 has 6 divisors (see below), whose sum is σ = 17082000. Its totient is φ = 7883988.

The previous prime is 11825987. The next prime is 11826007. The reversal of 11825991 is 19952811.

11825991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11825991 - 2² = 11825987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11825921) 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 5 ways as a sum of consecutive naturals, for example, 656991 + ... + 657008.

It is an arithmetic number, because the mean of its divisors is an integer number (2847000).

Almost surely, 2^11825991 is an apocalyptic number.

11825991 is a deficient number, since it is larger than the sum of its proper divisors (5256009).

11825991 is a wasteful number, since it uses less digits than its factorization.

11825991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314005 (or 1314002 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 11825991 is about 3438.8938628576. The cubic root of 11825991 is about 227.8308417495.

The spelling of 11825991 in words is "eleven million, eight hundred twenty-five thousand, nine hundred ninety-one".