142122187 has 2 divisors, whose sum is σ = 142122188. Its totient is φ = 142122186.

The previous prime is 142122163. The next prime is 142122269. The reversal of 142122187 is 781221241.

142122187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142122187 - 2⁷ = 142122059 is a prime.

It is not a weakly prime, because it can be changed into another prime (142122107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71061093 + 71061094.

It is an arithmetic number, because the mean of its divisors is an integer number (71061094).

Almost surely, 2^142122187 is an apocalyptic number.

142122187 is a deficient number, since it is larger than the sum of its proper divisors (1).

142122187 is an equidigital number, since it uses as much as digits as its factorization.

142122187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 28.

The square root of 142122187 is about 11921.5010380405. The cubic root of 142122187 is about 521.8599407466.

The spelling of 142122187 in words is "one hundred forty-two million, one hundred twenty-two thousand, one hundred eighty-seven".