11424721 has 16 divisors (see below), whose sum is σ = 14865408. Its totient is φ = 8514000.

The previous prime is 11424703. The next prime is 11424737. The reversal of 11424721 is 12742411.

It is not a de Polignac number, because 11424721 - 2⁷ = 11424593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11424692 and 11424701.

It is not an unprimeable number, because it can be changed into a prime (11424121) 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 15 ways as a sum of consecutive naturals, for example, 1455 + ... + 4996.

It is an arithmetic number, because the mean of its divisors is an integer number (929088).

Almost surely, 2^11424721 is an apocalyptic number.

11424721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11424721 is a deficient number, since it is larger than the sum of its proper divisors (3440687).

11424721 is a wasteful number, since it uses less digits than its factorization.

11424721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492.

The product of its digits is 448, while the sum is 22.

The square root of 11424721 is about 3380.0474848735. The cubic root of 11424721 is about 225.2242767814.

The spelling of 11424721 in words is "eleven million, four hundred twenty-four thousand, seven hundred twenty-one".