1142139238 has 4 divisors (see below), whose sum is σ = 1713208860. Its totient is φ = 571069618.

The previous prime is 1142139233. The next prime is 1142139263. The reversal of 1142139238 is 8329312411.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142139233) 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 as a sum of consecutive naturals, namely, 285534808 + ... + 285534811.

It is an arithmetic number, because the mean of its divisors is an integer number (428302215).

Almost surely, 2^1142139238 is an apocalyptic number.

1142139238 is a deficient number, since it is larger than the sum of its proper divisors (571069622).

1142139238 is an equidigital number, since it uses as much as digits as its factorization.

1142139238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571069621.

The product of its digits is 10368, while the sum is 34.

The square root of 1142139238 is about 33795.5505651262. The cubic root of 1142139238 is about 1045.2969518489.

The spelling of 1142139238 in words is "one billion, one hundred forty-two million, one hundred thirty-nine thousand, two hundred thirty-eight".