11265221 has 12 divisors (see below), whose sum is σ = 12482316. Its totient is φ = 10158720.

The previous prime is 11265209. The next prime is 11265223. The reversal of 11265221 is 12256211.

It can be written as a sum of positive squares in 2 ways, for example, as 5085025 + 6180196 = 2255^2 + 2486^2 .

It is not a de Polignac number, because 11265221 - 2¹⁸ = 11003077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11265193 and 11265202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11265223) 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, 18701 + ... + 19293.

It is an arithmetic number, because the mean of its divisors is an integer number (1040193).

Almost surely, 2^11265221 is an apocalyptic number.

11265221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11265221 is a deficient number, since it is larger than the sum of its proper divisors (1217095).

11265221 is a wasteful number, since it uses less digits than its factorization.

11265221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 761 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 11265221 is about 3356.3702119999. The cubic root of 11265221 is about 224.1712458047.

The spelling of 11265221 in words is "eleven million, two hundred sixty-five thousand, two hundred twenty-one".