142388291 has 2 divisors, whose sum is σ = 142388292. Its totient is φ = 142388290.

The previous prime is 142388287. The next prime is 142388297. The reversal of 142388291 is 192883241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142388291 - 2² = 142388287 is a prime.

It is not a weakly prime, because it can be changed into another prime (142388297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71194145 + 71194146.

It is an arithmetic number, because the mean of its divisors is an integer number (71194146).

Almost surely, 2^142388291 is an apocalyptic number.

142388291 is a deficient number, since it is larger than the sum of its proper divisors (1).

142388291 is an equidigital number, since it uses as much as digits as its factorization.

142388291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 142388291 is about 11932.6564938408. The cubic root of 142388291 is about 522.1854410307.

The spelling of 142388291 in words is "one hundred forty-two million, three hundred eighty-eight thousand, two hundred ninety-one".