142556129 has 2 divisors, whose sum is σ = 142556130. Its totient is φ = 142556128.

The previous prime is 142556087. The next prime is 142556131. The reversal of 142556129 is 921655241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118810000 + 23746129 = 10900^2 + 4873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142556129 is a prime.

It is a Sophie Germain prime.

Together with 142556131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142556149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71278064 + 71278065.

It is an arithmetic number, because the mean of its divisors is an integer number (71278065).

Almost surely, 2^142556129 is an apocalyptic number.

It is an amenable number.

142556129 is a deficient number, since it is larger than the sum of its proper divisors (1).

142556129 is an equidigital number, since it uses as much as digits as its factorization.

142556129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 142556129 is about 11939.6871399547. The cubic root of 142556129 is about 522.3905331447.

The spelling of 142556129 in words is "one hundred forty-two million, five hundred fifty-six thousand, one hundred twenty-nine".