11844721 has 12 divisors (see below), whose sum is σ = 13872432. Its totient is φ = 10083528.

The previous prime is 11844719. The next prime is 11844727. The reversal of 11844721 is 12744811.

It is not a de Polignac number, because 11844721 - 2¹ = 11844719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11844721.

It is not an unprimeable number, because it can be changed into a prime (11844727) 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 11 ways as a sum of consecutive naturals, for example, 7246 + ... + 8728.

It is an arithmetic number, because the mean of its divisors is an integer number (1156036).

Almost surely, 2^11844721 is an apocalyptic number.

It is an amenable number.

11844721 is a deficient number, since it is larger than the sum of its proper divisors (2027711).

11844721 is a wasteful number, since it uses less digits than its factorization.

11844721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1653 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 11844721 is about 3441.6160448255. The cubic root of 11844721 is about 227.9510577723.

The spelling of 11844721 in words is "eleven million, eight hundred forty-four thousand, seven hundred twenty-one".