11531243 has 4 divisors (see below), whose sum is σ = 11591808. Its totient is φ = 11470680.

The previous prime is 11531239. The next prime is 11531249. The reversal of 11531243 is 34213511.

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 11531243 - 2² = 11531239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531249) 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, 29996 + ... + 30377.

It is an arithmetic number, because the mean of its divisors is an integer number (2897952).

Almost surely, 2^11531243 is an apocalyptic number.

11531243 is a deficient number, since it is larger than the sum of its proper divisors (60565).

11531243 is an equidigital number, since it uses as much as digits as its factorization.

11531243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60564.

The product of its digits is 360, while the sum is 20.

The square root of 11531243 is about 3395.7683961071. The cubic root of 11531243 is about 225.9220957373.

Adding to 11531243 its reverse (34213511), we get a palindrome (45744754).

The spelling of 11531243 in words is "eleven million, five hundred thirty-one thousand, two hundred forty-three".