11450721 has 4 divisors (see below), whose sum is σ = 15267632. Its totient is φ = 7633812.

The previous prime is 11450717. The next prime is 11450743. The reversal of 11450721 is 12705411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11450721 - 2² = 11450717 is a prime.

It is a super-2 number, since 2×11450721² = 262238022839682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11450321) 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 3 ways as a sum of consecutive naturals, for example, 1908451 + ... + 1908456.

It is an arithmetic number, because the mean of its divisors is an integer number (3816908).

Almost surely, 2^11450721 is an apocalyptic number.

It is an amenable number.

11450721 is a deficient number, since it is larger than the sum of its proper divisors (3816911).

11450721 is an equidigital number, since it uses as much as digits as its factorization.

11450721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816910.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11450721 is about 3383.8913989666. The cubic root of 11450721 is about 225.3949999770.

The spelling of 11450721 in words is "eleven million, four hundred fifty thousand, seven hundred twenty-one".