1142912191 has 2 divisors, whose sum is σ = 1142912192. Its totient is φ = 1142912190.

The previous prime is 1142912189. The next prime is 1142912201. The reversal of 1142912191 is 1912192411.

It is a weak prime.

It is an emirp because it is prime and its reverse (1912192411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1142912191 - 2¹ = 1142912189 is a prime.

Together with 1142912189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142912131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571456095 + 571456096.

It is an arithmetic number, because the mean of its divisors is an integer number (571456096).

Almost surely, 2^1142912191 is an apocalyptic number.

1142912191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142912191 is an equidigital number, since it uses as much as digits as its factorization.

1142912191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 31.

The square root of 1142912191 is about 33806.9843523494. The cubic root of 1142912191 is about 1045.5327033785.

The spelling of 1142912191 in words is "one billion, one hundred forty-two million, nine hundred twelve thousand, one hundred ninety-one".