142247489 has 2 divisors, whose sum is σ = 142247490. Its totient is φ = 142247488.

The previous prime is 142247477. The next prime is 142247503. The reversal of 142247489 is 984742241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87235600 + 55011889 = 9340^2 + 7417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142247489 is a prime.

It is not a weakly prime, because it can be changed into another prime (142247419) 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, 71123744 + 71123745.

It is an arithmetic number, because the mean of its divisors is an integer number (71123745).

Almost surely, 2^142247489 is an apocalyptic number.

It is an amenable number.

142247489 is a deficient number, since it is larger than the sum of its proper divisors (1).

142247489 is an equidigital number, since it uses as much as digits as its factorization.

142247489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 142247489 is about 11926.7551748160. The cubic root of 142247489 is about 522.0132616038.

The spelling of 142247489 in words is "one hundred forty-two million, two hundred forty-seven thousand, four hundred eighty-nine".