1142431139 has 2 divisors, whose sum is σ = 1142431140. Its totient is φ = 1142431138.

The previous prime is 1142431117. The next prime is 1142431141. The reversal of 1142431139 is 9311342411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1142431139 - 2²⁰ = 1141382563 is a prime.

Together with 1142431141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1142437139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571215569 + 571215570.

It is an arithmetic number, because the mean of its divisors is an integer number (571215570).

Almost surely, 2^1142431139 is an apocalyptic number.

1142431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142431139 is an equidigital number, since it uses as much as digits as its factorization.

1142431139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1142431139 is about 33799.8689198642. The cubic root of 1142431139 is about 1045.3859944761.

The spelling of 1142431139 in words is "one billion, one hundred forty-two million, four hundred thirty-one thousand, one hundred thirty-nine".