555139 has 4 divisors (see below), whose sum is σ = 597856. Its totient is φ = 512424.

The previous prime is 555119. The next prime is 555143. The reversal of 555139 is 931555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931555 = 5 ⋅186311.

It is a cyclic number.

It is not a de Polignac number, because 555139 - 2⁹ = 554627 is a prime.

It is a Duffinian number.

555139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (555109) 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, 21339 + ... + 21364.

It is an arithmetic number, because the mean of its divisors is an integer number (149464).

2⁵⁵⁵¹³⁹ is an apocalyptic number.

555139 is a deficient number, since it is larger than the sum of its proper divisors (42717).

555139 is a wasteful number, since it uses less digits than its factorization.

555139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42716.

The product of its digits is 3375, while the sum is 28.

The square root of 555139 is about 745.0765061388. The cubic root of 555139 is about 82.1865177202.

The spelling of 555139 in words is "five hundred fifty-five thousand, one hundred thirty-nine".