1142440279 has 2 divisors, whose sum is σ = 1142440280. Its totient is φ = 1142440278.

The previous prime is 1142440219. The next prime is 1142440331. The reversal of 1142440279 is 9720442411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9720442411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142440279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142440219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571220139 + 571220140.

It is an arithmetic number, because the mean of its divisors is an integer number (571220140).

Almost surely, 2^1142440279 is an apocalyptic number.

1142440279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142440279 is an equidigital number, since it uses as much as digits as its factorization.

1142440279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1142440279 is about 33800.0041272187. The cubic root of 1142440279 is about 1045.3887823327.

The spelling of 1142440279 in words is "one billion, one hundred forty-two million, four hundred forty thousand, two hundred seventy-nine".