142729 has 4 divisors (see below), whose sum is σ = 145476. Its totient is φ = 139984.

The previous prime is 142711. The next prime is 142733. The reversal of 142729 is 927241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 61504 = 285^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 142729 - 2⁵ = 142697 is a prime.

It is a Duffinian number.

142729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (142759) 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, 1294 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (36369).

2¹⁴²⁷²⁹ is an apocalyptic number.

It is an amenable number.

142729 is a deficient number, since it is larger than the sum of its proper divisors (2747).

142729 is an equidigital number, since it uses as much as digits as its factorization.

142729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746.

The product of its digits is 1008, while the sum is 25.

The square root of 142729 is about 377.7949179118. The cubic root of 142729 is about 52.2601607187.

The spelling of 142729 in words is "one hundred forty-two thousand, seven hundred twenty-nine".