142188157 has 2 divisors, whose sum is σ = 142188158. Its totient is φ = 142188156.

The previous prime is 142188121. The next prime is 142188173. The reversal of 142188157 is 751881241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133772356 + 8415801 = 11566^2 + 2901^2 .

It is a cyclic number.

It is not a de Polignac number, because 142188157 - 2¹⁵ = 142155389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142188257) 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, 71094078 + 71094079.

It is an arithmetic number, because the mean of its divisors is an integer number (71094079).

Almost surely, 2^142188157 is an apocalyptic number.

It is an amenable number.

142188157 is a deficient number, since it is larger than the sum of its proper divisors (1).

142188157 is an equidigital number, since it uses as much as digits as its factorization.

142188157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 37.

The square root of 142188157 is about 11924.2675666055. The cubic root of 142188157 is about 521.9406735667.

The spelling of 142188157 in words is "one hundred forty-two million, one hundred eighty-eight thousand, one hundred fifty-seven".