11243505 has 32 divisors (see below), whose sum is σ = 22143744. Its totient is φ = 4743936.

The previous prime is 11243467. The next prime is 11243509. The reversal of 11243505 is 50534211.

It is not a de Polignac number, because 11243505 - 2⁹ = 11242993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11243509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2754 + ... + 5483.

It is an arithmetic number, because the mean of its divisors is an integer number (691992).

Almost surely, 2^11243505 is an apocalyptic number.

11243505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11243505 is a deficient number, since it is larger than the sum of its proper divisors (10900239).

11243505 is a wasteful number, since it uses less digits than its factorization.

11243505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 11243505 is about 3353.1336090290. The cubic root of 11243505 is about 224.0271079544.

Adding to 11243505 its reverse (50534211), we get a palindrome (61777716).

The spelling of 11243505 in words is "eleven million, two hundred forty-three thousand, five hundred five".