142178389 has 2 divisors, whose sum is σ = 142178390. Its totient is φ = 142178388.

The previous prime is 142178381. The next prime is 142178417. The reversal of 142178389 is 983871241.

142178389 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 can be written as a sum of positive squares in only one way, i.e., 92968164 + 49210225 = 9642^2 + 7015^2 .

It is a cyclic number.

It is not a de Polignac number, because 142178389 - 2³ = 142178381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142178381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71089194 + 71089195.

It is an arithmetic number, because the mean of its divisors is an integer number (71089195).

Almost surely, 2^142178389 is an apocalyptic number.

It is an amenable number.

142178389 is a deficient number, since it is larger than the sum of its proper divisors (1).

142178389 is an equidigital number, since it uses as much as digits as its factorization.

142178389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 142178389 is about 11923.8579746657. The cubic root of 142178389 is about 521.9287212510.

The spelling of 142178389 in words is "one hundred forty-two million, one hundred seventy-eight thousand, three hundred eighty-nine".