142909256729 has 2 divisors, whose sum is σ = 142909256730. Its totient is φ = 142909256728.

The previous prime is 142909256683. The next prime is 142909256747. The reversal of 142909256729 is 927652909241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76372086025 + 66537170704 = 276355^2 + 257948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142909256729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142909256129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71454628364 + 71454628365.

It is an arithmetic number, because the mean of its divisors is an integer number (71454628365).

Almost surely, 2^142909256729 is an apocalyptic number.

It is an amenable number.

142909256729 is a deficient number, since it is larger than the sum of its proper divisors (1).

142909256729 is an equidigital number, since it uses as much as digits as its factorization.

142909256729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 142909256729 in words is "one hundred forty-two billion, nine hundred nine million, two hundred fifty-six thousand, seven hundred twenty-nine".