11821849 has 8 divisors (see below), whose sum is σ = 12785472. Its totient is φ = 10866000.

The previous prime is 11821847. The next prime is 11821853. The reversal of 11821849 is 94812811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11821849 - 2¹ = 11821847 is a prime.

It is a super-2 number, since 2×11821849² = 279512227557602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11821841) 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 in 7 ways as a sum of consecutive naturals, for example, 1452 + ... + 5074.

It is an arithmetic number, because the mean of its divisors is an integer number (1598184).

Almost surely, 2^11821849 is an apocalyptic number.

It is an amenable number.

11821849 is a deficient number, since it is larger than the sum of its proper divisors (963623).

11821849 is a wasteful number, since it uses less digits than its factorization.

11821849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887.

The product of its digits is 4608, while the sum is 34.

The square root of 11821849 is about 3438.2915815853. The cubic root of 11821849 is about 227.8042397353.

The spelling of 11821849 in words is "eleven million, eight hundred twenty-one thousand, eight hundred forty-nine".