11721264 has 40 divisors (see below), whose sum is σ = 30562032. Its totient is φ = 3870720.

The previous prime is 11721263. The next prime is 11721287. The reversal of 11721264 is 46212711.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (11721263) 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, 4344 + ... + 6504.

Almost surely, 2^11721264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11721264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15281016).

11721264 is an abundant number, since it is smaller than the sum of its proper divisors (18840768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11721264 is a wasteful number, since it uses less digits than its factorization.

11721264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285 (or 2279 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 11721264 is about 3423.6331579186. The cubic root of 11721264 is about 227.1563155779.

Adding to 11721264 its reverse (46212711), we get a palindrome (57933975).

The spelling of 11721264 in words is "eleven million, seven hundred twenty-one thousand, two hundred sixty-four".