340139 has 4 divisors (see below), whose sum is σ = 347424. Its totient is φ = 332856.

The previous prime is 340129. The next prime is 340169. The reversal of 340139 is 931043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931043 = 61 ⋅15263.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340139 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 340139.

It is not an unprimeable number, because it can be changed into a prime (340129) 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, 3572 + ... + 3665.

It is an arithmetic number, because the mean of its divisors is an integer number (86856).

2³⁴⁰¹³⁹ is an apocalyptic number.

340139 is a deficient number, since it is larger than the sum of its proper divisors (7285).

340139 is an equidigital number, since it uses as much as digits as its factorization.

340139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 340139 is about 583.2143688216. The cubic root of 340139 is about 69.8048304963.

The spelling of 340139 in words is "three hundred forty thousand, one hundred thirty-nine".