142447129 has 12 divisors (see below), whose sum is σ = 157644900. Its totient is φ = 128612000.

The previous prime is 142447121. The next prime is 142447141. The reversal of 142447129 is 921744241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53993104 + 88454025 = 7348^2 + 9405^2 .

It is not a de Polignac number, because 142447129 - 2³ = 142447121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142447094 and 142447103.

It is not an unprimeable number, because it can be changed into a prime (142447121) 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 11 ways as a sum of consecutive naturals, for example, 14079 + ... + 21979.

It is an arithmetic number, because the mean of its divisors is an integer number (13137075).

Almost surely, 2^142447129 is an apocalyptic number.

It is an amenable number.

142447129 is a deficient number, since it is larger than the sum of its proper divisors (15197771).

142447129 is a wasteful number, since it uses less digits than its factorization.

142447129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8072 (or 8061 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 142447129 is about 11935.1216583661. The cubic root of 142447129 is about 522.2573573279.

The spelling of 142447129 in words is "one hundred forty-two million, four hundred forty-seven thousand, one hundred twenty-nine".