11146721 has 4 divisors (see below), whose sum is σ = 11193600. Its totient is φ = 11099844.

The previous prime is 11146703. The next prime is 11146727. The reversal of 11146721 is 12764111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12764111 = 1301 ⋅9811.

It is a cyclic number.

It is not a de Polignac number, because 11146721 - 2¹⁰ = 11145697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11146727) 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 3 ways as a sum of consecutive naturals, for example, 23081 + ... + 23558.

It is an arithmetic number, because the mean of its divisors is an integer number (2798400).

Almost surely, 2^11146721 is an apocalyptic number.

It is an amenable number.

11146721 is a deficient number, since it is larger than the sum of its proper divisors (46879).

11146721 is an equidigital number, since it uses as much as digits as its factorization.

11146721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46878.

The product of its digits is 336, while the sum is 23.

The square root of 11146721 is about 3338.6705437943. The cubic root of 11146721 is about 223.3824468110.

The spelling of 11146721 in words is "eleven million, one hundred forty-six thousand, seven hundred twenty-one".