142811791 has 2 divisors, whose sum is σ = 142811792. Its totient is φ = 142811790.

The previous prime is 142811789. The next prime is 142811813. The reversal of 142811791 is 197118241.

It is a weak prime.

It is an emirp because it is prime and its reverse (197118241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142811791 - 2¹ = 142811789 is a prime.

Together with 142811789, 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 (142811731) 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, 71405895 + 71405896.

It is an arithmetic number, because the mean of its divisors is an integer number (71405896).

Almost surely, 2^142811791 is an apocalyptic number.

142811791 is a deficient number, since it is larger than the sum of its proper divisors (1).

142811791 is an equidigital number, since it uses as much as digits as its factorization.

142811791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 34.

The square root of 142811791 is about 11950.3887384470. The cubic root of 142811791 is about 522.7026339499.

The spelling of 142811791 in words is "one hundred forty-two million, eight hundred eleven thousand, seven hundred ninety-one".