345139 has 2 divisors, whose sum is σ = 345140. Its totient is φ = 345138.

The previous prime is 345133. The next prime is 345143. The reversal of 345139 is 931543.

It is a strong prime.

It is an emirp because it is prime and its reverse (931543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345139 - 2⁷ = 345011 is a prime.

It is a super-3 number, since 3×345139³ = 123339835274761857, which contains 333 as substring.

345139 is a lucky number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (345133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172569 + 172570.

It is an arithmetic number, because the mean of its divisors is an integer number (172570).

2³⁴⁵¹³⁹ is an apocalyptic number.

345139 is a deficient number, since it is larger than the sum of its proper divisors (1).

345139 is an equidigital number, since it uses as much as digits as its factorization.

345139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 345139 is about 587.4853189655. The cubic root of 345139 is about 70.1452087731.

It can be divided in two parts, 345 and 139, that added together give a palindrome (484).

The spelling of 345139 in words is "three hundred forty-five thousand, one hundred thirty-nine".