1142647171 has 4 divisors (see below), whose sum is σ = 1146895200. Its totient is φ = 1138399144.

The previous prime is 1142647169. The next prime is 1142647211. The reversal of 1142647171 is 1717462411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1142647171 - 2¹ = 1142647169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142647111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123611 + ... + 2124148.

It is an arithmetic number, because the mean of its divisors is an integer number (286723800).

Almost surely, 2^1142647171 is an apocalyptic number.

1142647171 is a deficient number, since it is larger than the sum of its proper divisors (4248029).

1142647171 is an equidigital number, since it uses as much as digits as its factorization.

1142647171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248028.

The product of its digits is 9408, while the sum is 34.

The square root of 1142647171 is about 33803.0645208389. The cubic root of 1142647171 is about 1045.4518839598.

The spelling of 1142647171 in words is "one billion, one hundred forty-two million, six hundred forty-seven thousand, one hundred seventy-one".