142247477 has 2 divisors, whose sum is σ = 142247478. Its totient is φ = 142247476.

The previous prime is 142247467. The next prime is 142247489. The reversal of 142247477 is 774742241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118178641 + 24068836 = 10871^2 + 4906^2 .

It is a cyclic number.

It is not a de Polignac number, because 142247477 - 2⁸ = 142247221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142247477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142247447) 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, 71123738 + 71123739.

It is an arithmetic number, because the mean of its divisors is an integer number (71123739).

Almost surely, 2^142247477 is an apocalyptic number.

It is an amenable number.

142247477 is a deficient number, since it is larger than the sum of its proper divisors (1).

142247477 is an equidigital number, since it uses as much as digits as its factorization.

142247477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 38.

The square root of 142247477 is about 11926.7546717454. The cubic root of 142247477 is about 522.0132469248.

The spelling of 142247477 in words is "one hundred forty-two million, two hundred forty-seven thousand, four hundred seventy-seven".