142247129 has 8 divisors (see below), whose sum is σ = 153781440. Its totient is φ = 131117616.

The previous prime is 142247101. The next prime is 142247153. The reversal of 142247129 is 921742241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142247129 - 2²⁰ = 141198553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142247095 and 142247104.

It is not an unprimeable number, because it can be changed into a prime (142207129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100469 + ... + 101874.

It is an arithmetic number, because the mean of its divisors is an integer number (19222680).

Almost surely, 2^142247129 is an apocalyptic number.

142247129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

142247129 is a deficient number, since it is larger than the sum of its proper divisors (11534311).

142247129 is a wasteful number, since it uses less digits than its factorization.

142247129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202399.

The product of its digits is 8064, while the sum is 32.

The square root of 142247129 is about 11926.7400826881. The cubic root of 142247129 is about 522.0128212330.

The spelling of 142247129 in words is "one hundred forty-two million, two hundred forty-seven thousand, one hundred twenty-nine".