1242312243 has 8 divisors (see below), whose sum is σ = 1664999568. Its totient is φ = 823916544.

The previous prime is 1242312233. The next prime is 1242312251. The reversal of 1242312243 is 3422132421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1242312243 - 2²⁵ = 1208757811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242312233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072230 + ... + 1073387.

It is an arithmetic number, because the mean of its divisors is an integer number (208124946).

Almost surely, 2^1242312243 is an apocalyptic number.

1242312243 is a deficient number, since it is larger than the sum of its proper divisors (422687325).

1242312243 is a wasteful number, since it uses less digits than its factorization.

1242312243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145813.

The product of its digits is 2304, while the sum is 24.

The square root of 1242312243 is about 35246.4500765680. The cubic root of 1242312243 is about 1075.0044327922.

Adding to 1242312243 its reverse (3422132421), we get a palindrome (4664444664).

The spelling of 1242312243 in words is "one billion, two hundred forty-two million, three hundred twelve thousand, two hundred forty-three".