1142242271 has 4 divisors (see below), whose sum is σ = 1142314200. Its totient is φ = 1142170344.

The previous prime is 1142242253. The next prime is 1142242327. The reversal of 1142242271 is 1722422411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1142242271 - 2³⁰ = 68500447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142242271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142242571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461 + ... + 47798.

It is an arithmetic number, because the mean of its divisors is an integer number (285578550).

Almost surely, 2^1142242271 is an apocalyptic number.

1142242271 is a deficient number, since it is larger than the sum of its proper divisors (71929).

1142242271 is an equidigital number, since it uses as much as digits as its factorization.

1142242271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71928.

The product of its digits is 1792, while the sum is 26.

The square root of 1142242271 is about 33797.0748882207. The cubic root of 1142242271 is about 1045.3283831720.

Adding to 1142242271 its reverse (1722422411), we get a palindrome (2864664682).

The spelling of 1142242271 in words is "one billion, one hundred forty-two million, two hundred forty-two thousand, two hundred seventy-one".