1142243313 has 8 divisors (see below), whose sum is σ = 1560137376. Its totient is φ = 742922400.

The previous prime is 1142243309. The next prime is 1142243321. The reversal of 1142243313 is 3133422411.

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 1142243313 - 2² = 1142243309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142243393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4643143 + ... + 4643388.

It is an arithmetic number, because the mean of its divisors is an integer number (195017172).

Almost surely, 2^1142243313 is an apocalyptic number.

It is an amenable number.

1142243313 is a deficient number, since it is larger than the sum of its proper divisors (417894063).

1142243313 is an equidigital number, since it uses as much as digits as its factorization.

1142243313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9286575.

The product of its digits is 1728, while the sum is 24.

The square root of 1142243313 is about 33797.0903037525. The cubic root of 1142243313 is about 1045.3287010357.

Adding to 1142243313 its reverse (3133422411), we get a palindrome (4275665724).

The spelling of 1142243313 in words is "one billion, one hundred forty-two million, two hundred forty-three thousand, three hundred thirteen".