142441391 has 2 divisors, whose sum is σ = 142441392. Its totient is φ = 142441390.

The previous prime is 142441381. The next prime is 142441427. The reversal of 142441391 is 193144241.

It is a weak prime.

It is an emirp because it is prime and its reverse (193144241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142441391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142441361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71220695 + 71220696.

It is an arithmetic number, because the mean of its divisors is an integer number (71220696).

Almost surely, 2^142441391 is an apocalyptic number.

142441391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142441391 is an equidigital number, since it uses as much as digits as its factorization.

142441391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 142441391 is about 11934.8812729746. The cubic root of 142441391 is about 522.2503447776.

The spelling of 142441391 in words is "one hundred forty-two million, four hundred forty-one thousand, three hundred ninety-one".