142020129 has 4 divisors (see below), whose sum is σ = 189360176. Its totient is φ = 94680084.

The previous prime is 142020119. The next prime is 142020149. The reversal of 142020129 is 921020241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 142020129 - 2¹² = 142016033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142020119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23670019 + ... + 23670024.

It is an arithmetic number, because the mean of its divisors is an integer number (47340044).

Almost surely, 2^142020129 is an apocalyptic number.

It is an amenable number.

142020129 is a deficient number, since it is larger than the sum of its proper divisors (47340047).

142020129 is an equidigital number, since it uses as much as digits as its factorization.

142020129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47340046.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 142020129 is about 11917.2198519621. The cubic root of 142020129 is about 521.7349948890.

The spelling of 142020129 in words is "one hundred forty-two million, twenty thousand, one hundred twenty-nine".