142945591 has 2 divisors, whose sum is σ = 142945592. Its totient is φ = 142945590.

The previous prime is 142945589. The next prime is 142945637. The reversal of 142945591 is 195549241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142945591 - 2¹ = 142945589 is a prime.

Together with 142945589, 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 (142945501) 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, 71472795 + 71472796.

It is an arithmetic number, because the mean of its divisors is an integer number (71472796).

Almost surely, 2^142945591 is an apocalyptic number.

142945591 is a deficient number, since it is larger than the sum of its proper divisors (1).

142945591 is an equidigital number, since it uses as much as digits as its factorization.

142945591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 142945591 is about 11955.9855720890. The cubic root of 142945591 is about 522.8658225816.

The spelling of 142945591 in words is "one hundred forty-two million, nine hundred forty-five thousand, five hundred ninety-one".