1240324243 has 4 divisors (see below), whose sum is σ = 1294251408. Its totient is φ = 1186397080.

The previous prime is 1240324201. The next prime is 1240324277. The reversal of 1240324243 is 3424230421.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240324243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240324643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26963548 + ... + 26963593.

It is an arithmetic number, because the mean of its divisors is an integer number (323562852).

Almost surely, 2^1240324243 is an apocalyptic number.

1240324243 is a deficient number, since it is larger than the sum of its proper divisors (53927165).

1240324243 is an equidigital number, since it uses as much as digits as its factorization.

1240324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53927164.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1240324243 is about 35218.2373636160. The cubic root of 1240324243 is about 1074.4307042999.

Adding to 1240324243 its reverse (3424230421), we get a palindrome (4664554664).

The spelling of 1240324243 in words is "one billion, two hundred forty million, three hundred twenty-four thousand, two hundred forty-three".