11743821 has 12 divisors (see below), whose sum is σ = 17961372. Its totient is φ = 7368576.

The previous prime is 11743813. The next prime is 11743829. The reversal of 11743821 is 12834711.

11743821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11743813) and next prime (11743829).

It can be written as a sum of positive squares in 2 ways, for example, as 10017225 + 1726596 = 3165^2 + 1314^2 .

It is not a de Polignac number, because 11743821 - 2³ = 11743813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11743829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38226 + ... + 38531.

It is an arithmetic number, because the mean of its divisors is an integer number (1496781).

Almost surely, 2^11743821 is an apocalyptic number.

It is an amenable number.

11743821 is a deficient number, since it is larger than the sum of its proper divisors (6217551).

11743821 is a wasteful number, since it uses less digits than its factorization.

11743821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76780 (or 76777 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11743821 is about 3426.9258818947. The cubic root of 11743821 is about 227.3019392803.

The spelling of 11743821 in words is "eleven million, seven hundred forty-three thousand, eight hundred twenty-one".