517139 has 4 divisors (see below), whose sum is σ = 591024. Its totient is φ = 443256.

The previous prime is 517129. The next prime is 517151. The reversal of 517139 is 931715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931715 = 5 ⋅186343.

It is a cyclic number.

It is not a de Polignac number, because 517139 - 2⁸ = 516883 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 517139.

It is not an unprimeable number, because it can be changed into a prime (517129) 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, 36932 + ... + 36945.

It is an arithmetic number, because the mean of its divisors is an integer number (147756).

2⁵¹⁷¹³⁹ is an apocalyptic number.

517139 is a deficient number, since it is larger than the sum of its proper divisors (73885).

517139 is an equidigital number, since it uses as much as digits as its factorization.

517139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73884.

The product of its digits is 945, while the sum is 26.

The square root of 517139 is about 719.1237723786. The cubic root of 517139 is about 80.2667657119.

It can be divided in two parts, 517 and 139, that added together give a palindrome (656).

The spelling of 517139 in words is "five hundred seventeen thousand, one hundred thirty-nine".