1143242879 has 8 divisors (see below), whose sum is σ = 1157301600. Its totient is φ = 1129269600.

The previous prime is 1143242869. The next prime is 1143242887. The reversal of 1143242879 is 9782423411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143242879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143242839) 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, 5774 + ... + 48164.

It is an arithmetic number, because the mean of its divisors is an integer number (144662700).

Almost surely, 2^1143242879 is an apocalyptic number.

1143242879 is a deficient number, since it is larger than the sum of its proper divisors (14058721).

1143242879 is a wasteful number, since it uses less digits than its factorization.

1143242879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42721.

The product of its digits is 96768, while the sum is 41.

The square root of 1143242879 is about 33811.8748223165. The cubic root of 1143242879 is about 1045.6335311239.

The spelling of 1143242879 in words is "one billion, one hundred forty-three million, two hundred forty-two thousand, eight hundred seventy-nine".