142661089 has 2 divisors, whose sum is σ = 142661090. Its totient is φ = 142661088.

The previous prime is 142661087. The next prime is 142661119. The reversal of 142661089 is 980166241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132066064 + 10595025 = 11492^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 142661089 - 2¹ = 142661087 is a prime.

Together with 142661087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142661087) 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, 71330544 + 71330545.

It is an arithmetic number, because the mean of its divisors is an integer number (71330545).

Almost surely, 2^142661089 is an apocalyptic number.

It is an amenable number.

142661089 is a deficient number, since it is larger than the sum of its proper divisors (1).

142661089 is an equidigital number, since it uses as much as digits as its factorization.

142661089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 142661089 is about 11944.0817562507. The cubic root of 142661089 is about 522.5187087614.

The spelling of 142661089 in words is "one hundred forty-two million, six hundred sixty-one thousand, eighty-nine".