142991291 has 2 divisors, whose sum is σ = 142991292. Its totient is φ = 142991290.

The previous prime is 142991287. The next prime is 142991309. The reversal of 142991291 is 192199241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142991291 - 2² = 142991287 is a prime.

It is a Chen prime.

It is equal to p_8071598 and since 142991291 and 8071598 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (142991281) 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, 71495645 + 71495646.

It is an arithmetic number, because the mean of its divisors is an integer number (71495646).

Almost surely, 2^142991291 is an apocalyptic number.

142991291 is a deficient number, since it is larger than the sum of its proper divisors (1).

142991291 is an equidigital number, since it uses as much as digits as its factorization.

142991291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 38.

The square root of 142991291 is about 11957.8965959737. The cubic root of 142991291 is about 522.9215370717.

The spelling of 142991291 in words is "one hundred forty-two million, nine hundred ninety-one thousand, two hundred ninety-one".