142243044257 has 2 divisors, whose sum is σ = 142243044258. Its totient is φ = 142243044256.

The previous prime is 142243044173. The next prime is 142243044271. The reversal of 142243044257 is 752440342241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76889189521 + 65353854736 = 277289^2 + 255644^2 .

It is a cyclic number.

It is not a de Polignac number, because 142243044257 - 2¹⁸ = 142242782113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142243044257.

It is not a weakly prime, because it can be changed into another prime (142243044277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71121522128 + 71121522129.

It is an arithmetic number, because the mean of its divisors is an integer number (71121522129).

Almost surely, 2^142243044257 is an apocalyptic number.

It is an amenable number.

142243044257 is a deficient number, since it is larger than the sum of its proper divisors (1).

142243044257 is an equidigital number, since it uses as much as digits as its factorization.

142243044257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 38.

Adding to 142243044257 its reverse (752440342241), we get a palindrome (894683386498).

The spelling of 142243044257 in words is "one hundred forty-two billion, two hundred forty-three million, forty-four thousand, two hundred fifty-seven".