1143472771 has 6 divisors (see below), whose sum is σ = 1330162260. Its totient is φ = 980119476.

The previous prime is 1143472747. The next prime is 1143472783. The reversal of 1143472771 is 1772743411.

It is not a de Polignac number, because 1143472771 - 2⁷ = 1143472643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143472771.

It is not an unprimeable number, because it can be changed into a prime (1143472711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11668041 + ... + 11668138.

It is an arithmetic number, because the mean of its divisors is an integer number (221693710).

Almost surely, 2^1143472771 is an apocalyptic number.

1143472771 is a deficient number, since it is larger than the sum of its proper divisors (186689489).

1143472771 is an equidigital number, since it uses as much as digits as its factorization.

1143472771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23336193 (or 23336186 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 1143472771 is about 33815.2742263019. The cubic root of 1143472771 is about 1045.7036144157.

The spelling of 1143472771 in words is "one billion, one hundred forty-three million, four hundred seventy-two thousand, seven hundred seventy-one".