142527809 has 2 divisors, whose sum is σ = 142527810. Its totient is φ = 142527808.

The previous prime is 142527793. The next prime is 142527851. The reversal of 142527809 is 908725241.

142527809 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., 141681409 + 846400 = 11903^2 + 920^2 .

It is an emirp because it is prime and its reverse (908725241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142527809 - 2⁴ = 142527793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142527859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71263904 + 71263905.

It is an arithmetic number, because the mean of its divisors is an integer number (71263905).

Almost surely, 2^142527809 is an apocalyptic number.

It is an amenable number.

142527809 is a deficient number, since it is larger than the sum of its proper divisors (1).

142527809 is an equidigital number, since it uses as much as digits as its factorization.

142527809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 142527809 is about 11938.5011203249. The cubic root of 142527809 is about 522.3559383976.

The spelling of 142527809 in words is "one hundred forty-two million, five hundred twenty-seven thousand, eight hundred nine".