342739 has 4 divisors (see below), whose sum is σ = 346680. Its totient is φ = 338800.

The previous prime is 342733. The next prime is 342757. The reversal of 342739 is 937243.

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

It is a cyclic number.

It is not a de Polignac number, because 342739 - 2¹³ = 334547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1837 + ... + 2014.

It is an arithmetic number, because the mean of its divisors is an integer number (86670).

2³⁴²⁷³⁹ is an apocalyptic number.

342739 is a deficient number, since it is larger than the sum of its proper divisors (3941).

342739 is an equidigital number, since it uses as much as digits as its factorization.

342739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940.

The product of its digits is 4536, while the sum is 28.

The square root of 342739 is about 585.4391514069. The cubic root of 342739 is about 69.9822403926.

It can be divided in two parts, 342 and 739, that added together give a triangular number (1081 = T₄₆).

The spelling of 342739 in words is "three hundred forty-two thousand, seven hundred thirty-nine".