142739 has 4 divisors (see below), whose sum is σ = 145824. Its totient is φ = 139656.

The previous prime is 142733. The next prime is 142757. The reversal of 142739 is 937241.

142739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142739 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142739.

It is not an unprimeable number, because it can be changed into a prime (142733) 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, 1472 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (36456).

2¹⁴²⁷³⁹ is an apocalyptic number.

142739 is a deficient number, since it is larger than the sum of its proper divisors (3085).

142739 is an equidigital number, since it uses as much as digits as its factorization.

142739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its digits is 1512, while the sum is 26.

The square root of 142739 is about 377.8081523737. The cubic root of 142739 is about 52.2613811887.

The spelling of 142739 in words is "one hundred forty-two thousand, seven hundred thirty-nine".