1143916281 has 48 divisors (see below), whose sum is σ = 1818236160. Its totient is φ = 689794560.

The previous prime is 1143916237. The next prime is 1143916283. The reversal of 1143916281 is 1826193411.

1143916281 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1143916281 - 2¹⁰ = 1143915257 is a prime.

It is a super-2 number, since 2×1143916281² = 2617088915873741922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1143916283) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1255216 + ... + 1256126.

It is an arithmetic number, because the mean of its divisors is an integer number (37879920).

Almost surely, 2^1143916281 is an apocalyptic number.

It is an amenable number.

1143916281 is a deficient number, since it is larger than the sum of its proper divisors (674319879).

1143916281 is a wasteful number, since it uses less digits than its factorization.

1143916281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246 (or 1243 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1143916281 is about 33821.8314258705. The cubic root of 1143916281 is about 1045.8387932831.

The spelling of 1143916281 in words is "one billion, one hundred forty-three million, nine hundred sixteen thousand, two hundred eighty-one".