142171787 has 2 divisors, whose sum is σ = 142171788. Its totient is φ = 142171786.

The previous prime is 142171739. The next prime is 142171793. The reversal of 142171787 is 787171241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142171787 - 2⁸ = 142171531 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142171787.

It is not a weakly prime, because it can be changed into another prime (142171727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71085893 + 71085894.

It is an arithmetic number, because the mean of its divisors is an integer number (71085894).

Almost surely, 2^142171787 is an apocalyptic number.

142171787 is a deficient number, since it is larger than the sum of its proper divisors (1).

142171787 is an equidigital number, since it uses as much as digits as its factorization.

142171787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21952, while the sum is 38.

The square root of 142171787 is about 11923.5811315225. The cubic root of 142171787 is about 521.9206426047.

The spelling of 142171787 in words is "one hundred forty-two million, one hundred seventy-one thousand, seven hundred eighty-seven".