142031317 has 2 divisors, whose sum is σ = 142031318. Its totient is φ = 142031316.

The previous prime is 142031293. The next prime is 142031333. The reversal of 142031317 is 713130241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93045316 + 48986001 = 9646^2 + 6999^2 .

It is a cyclic number.

It is not a de Polignac number, because 142031317 - 2⁷ = 142031189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142031017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71015658 + 71015659.

It is an arithmetic number, because the mean of its divisors is an integer number (71015659).

Almost surely, 2^142031317 is an apocalyptic number.

It is an amenable number.

142031317 is a deficient number, since it is larger than the sum of its proper divisors (1).

142031317 is an equidigital number, since it uses as much as digits as its factorization.

142031317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 142031317 is about 11917.6892475010. The cubic root of 142031317 is about 521.7486948668.

Adding to 142031317 its reverse (713130241), we get a palindrome (855161558).

The spelling of 142031317 in words is "one hundred forty-two million, thirty-one thousand, three hundred seventeen".