1143030861 has 96 divisors (see below), whose sum is σ = 2048983040. Its totient is φ = 599622912.

The previous prime is 1143030803. The next prime is 1143030869. The reversal of 1143030861 is 1680303411.

It is not a de Polignac number, because 1143030861 - 2²¹ = 1140933709 is a prime.

It is a Duffinian number.

1143030861 is a modest number, since divided by 30861 gives 1143 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143030869) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9000180 + ... + 9000306.

Almost surely, 2^1143030861 is an apocalyptic number.

It is an amenable number.

1143030861 is a deficient number, since it is larger than the sum of its proper divisors (905952179).

1143030861 is a wasteful number, since it uses less digits than its factorization.

1143030861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1143030861 is about 33808.7394174938. The cubic root of 1143030861 is about 1045.5688884482.

The spelling of 1143030861 in words is "one billion, one hundred forty-three million, thirty thousand, eight hundred sixty-one".