142120871 has 2 divisors, whose sum is σ = 142120872. Its totient is φ = 142120870.

The previous prime is 142120829. The next prime is 142120907. The reversal of 142120871 is 178021241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142120871 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 142120871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142120471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71060435 + 71060436.

It is an arithmetic number, because the mean of its divisors is an integer number (71060436).

Almost surely, 2^142120871 is an apocalyptic number.

142120871 is a deficient number, since it is larger than the sum of its proper divisors (1).

142120871 is an equidigital number, since it uses as much as digits as its factorization.

142120871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 142120871 is about 11921.4458435208. The cubic root of 142120871 is about 521.8583299969.

The spelling of 142120871 in words is "one hundred forty-two million, one hundred twenty thousand, eight hundred seventy-one".