11005243 has 4 divisors (see below), whose sum is σ = 11302720. Its totient is φ = 10707768.

The previous prime is 11005231. The next prime is 11005259. The reversal of 11005243 is 34250011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11005243 - 2²¹ = 8908091 is a prime.

It is a super-2 number, since 2×11005243² = 242230746978098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11005223) 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, 148683 + ... + 148756.

It is an arithmetic number, because the mean of its divisors is an integer number (2825680).

Almost surely, 2^11005243 is an apocalyptic number.

11005243 is a deficient number, since it is larger than the sum of its proper divisors (297477).

11005243 is an equidigital number, since it uses as much as digits as its factorization.

11005243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297476.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 11005243 is about 3317.4151081829. The cubic root of 11005243 is about 222.4333377706.

Adding to 11005243 its reverse (34250011), we get a palindrome (45255254).

The spelling of 11005243 in words is "eleven million, five thousand, two hundred forty-three".