142957189 has 2 divisors, whose sum is σ = 142957190. Its totient is φ = 142957188.

The previous prime is 142957147. The next prime is 142957193. The reversal of 142957189 is 981759241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76860289 + 66096900 = 8767^2 + 8130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142957189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142957289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71478594 + 71478595.

It is an arithmetic number, because the mean of its divisors is an integer number (71478595).

Almost surely, 2^142957189 is an apocalyptic number.

It is an amenable number.

142957189 is a deficient number, since it is larger than the sum of its proper divisors (1).

142957189 is an equidigital number, since it uses as much as digits as its factorization.

142957189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 142957189 is about 11956.4705912740. The cubic root of 142957189 is about 522.8799632389.

The spelling of 142957189 in words is "one hundred forty-two million, nine hundred fifty-seven thousand, one hundred eighty-nine".