142042247 has 2 divisors, whose sum is σ = 142042248. Its totient is φ = 142042246.

The previous prime is 142042207. The next prime is 142042283. The reversal of 142042247 is 742240241.

142042247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (742240241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142042247 - 2¹⁶ = 141976711 is a prime.

It is a Chen prime.

It is equal to p_8020907 and since 142042247 and 8020907 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142042207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71021123 + 71021124.

It is an arithmetic number, because the mean of its divisors is an integer number (71021124).

Almost surely, 2^142042247 is an apocalyptic number.

142042247 is a deficient number, since it is larger than the sum of its proper divisors (1).

142042247 is an equidigital number, since it uses as much as digits as its factorization.

142042247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 26.

The square root of 142042247 is about 11918.1478007281. The cubic root of 142042247 is about 521.7620782227.

Adding to 142042247 its reverse (742240241), we get a palindrome (884282488).

The spelling of 142042247 in words is "one hundred forty-two million, forty-two thousand, two hundred forty-seven".