1142239161 has 8 divisors (see below), whose sum is σ = 1740554944. Its totient is φ = 652708080.

The previous prime is 1142239159. The next prime is 1142239171. The reversal of 1142239161 is 1619322411.

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

It is not a de Polignac number, because 1142239161 - 2¹ = 1142239159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1142239151) 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, 27196150 + ... + 27196191.

It is an arithmetic number, because the mean of its divisors is an integer number (217569368).

Almost surely, 2^1142239161 is an apocalyptic number.

It is an amenable number.

1142239161 is a deficient number, since it is larger than the sum of its proper divisors (598315783).

1142239161 is an equidigital number, since it uses as much as digits as its factorization.

1142239161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54392351.

The product of its digits is 2592, while the sum is 30.

The square root of 1142239161 is about 33797.0288782905. The cubic root of 1142239161 is about 1045.3274344608.

The spelling of 1142239161 in words is "one billion, one hundred forty-two million, two hundred thirty-nine thousand, one hundred sixty-one".