1143242113 has 8 divisors (see below), whose sum is σ = 1245018600. Its totient is φ = 1043442048.

The previous prime is 1143242069. The next prime is 1143242119. The reversal of 1143242113 is 3112423411.

It can be written as a sum of positive squares in 4 ways, for example, as 28483569 + 1114758544 = 5337^2 + 33388^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1143242113 - 2⁹ = 1143241601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143242119) 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, 492898 + ... + 495211.

It is an arithmetic number, because the mean of its divisors is an integer number (155627325).

Almost surely, 2^1143242113 is an apocalyptic number.

1143242113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1143242113 is a deficient number, since it is larger than the sum of its proper divisors (101776487).

1143242113 is an equidigital number, since it uses as much as digits as its factorization.

1143242113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988211.

The product of its digits is 576, while the sum is 22.

The square root of 1143242113 is about 33811.8634949333. The cubic root of 1143242113 is about 1045.6332975907.

Adding to 1143242113 its reverse (3112423411), we get a palindrome (4255665524).

The spelling of 1143242113 in words is "one billion, one hundred forty-three million, two hundred forty-two thousand, one hundred thirteen".