11220249 has 4 divisors (see below), whose sum is σ = 14960336. Its totient is φ = 7480164.

The previous prime is 11220247. The next prime is 11220269. The reversal of 11220249 is 94202211.

Added to its reverse (94202211) it gives a triangular number (105422460 = T₁₄₅₂₀).

11220249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11220249 - 2¹ = 11220247 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11220247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870039 + ... + 1870044.

It is an arithmetic number, because the mean of its divisors is an integer number (3740084).

Almost surely, 2^11220249 is an apocalyptic number.

It is an amenable number.

11220249 is a deficient number, since it is larger than the sum of its proper divisors (3740087).

11220249 is an equidigital number, since it uses as much as digits as its factorization.

11220249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740086.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 11220249 is about 3349.6640130019. The cubic root of 11220249 is about 223.8725425513.

Adding to 11220249 its reverse (94202211), we get a triangular number (105422460 = T₁₄₅₂₀).

The spelling of 11220249 in words is "eleven million, two hundred twenty thousand, two hundred forty-nine".