142717729 has 16 divisors (see below), whose sum is σ = 184072320. Its totient is φ = 107372160.

The previous prime is 142717717. The next prime is 142717781. The reversal of 142717729 is 927717241.

It is not a de Polignac number, because 142717729 - 2⁵ = 142717697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142717691 and 142717700.

It is not an unprimeable number, because it can be changed into a prime (142717789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29724 + ... + 34189.

It is an arithmetic number, because the mean of its divisors is an integer number (11504520).

Almost surely, 2^142717729 is an apocalyptic number.

It is an amenable number.

142717729 is a deficient number, since it is larger than the sum of its proper divisors (41354591).

142717729 is a wasteful number, since it uses less digits than its factorization.

142717729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63960.

The product of its digits is 49392, while the sum is 40.

The square root of 142717729 is about 11946.4525696962. The cubic root of 142717729 is about 522.5878505856.

The spelling of 142717729 in words is "one hundred forty-two million, seven hundred seventeen thousand, seven hundred twenty-nine".