1142912189 has 2 divisors, whose sum is σ = 1142912190. Its totient is φ = 1142912188.

The previous prime is 1142912167. The next prime is 1142912191. The reversal of 1142912189 is 9812192411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736688164 + 406224025 = 27142^2 + 20155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142912189 is a prime.

Together with 1142912191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142912989) 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 as a sum of consecutive naturals, namely, 571456094 + 571456095.

It is an arithmetic number, because the mean of its divisors is an integer number (571456095).

Almost surely, 2^1142912189 is an apocalyptic number.

It is an amenable number.

1142912189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142912189 is an equidigital number, since it uses as much as digits as its factorization.

1142912189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 38.

The square root of 1142912189 is about 33806.9843227698. The cubic root of 1142912189 is about 1045.5327027687.

The spelling of 1142912189 in words is "one billion, one hundred forty-two million, nine hundred twelve thousand, one hundred eighty-nine".