506129 has 4 divisors (see below), whose sum is σ = 545076. Its totient is φ = 467184.

The previous prime is 506119. The next prime is 506131. The reversal of 506129 is 921605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921605 = 5 ⋅184321.

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 483025 = 152^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 506129 - 2⁴ = 506113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506119) 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, 19454 + ... + 19479.

It is an arithmetic number, because the mean of its divisors is an integer number (136269).

2⁵⁰⁶¹²⁹ is an apocalyptic number.

It is an amenable number.

506129 is a deficient number, since it is larger than the sum of its proper divisors (38947).

506129 is a wasteful number, since it uses less digits than its factorization.

506129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38946.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 506129 is about 711.4274383238. The cubic root of 506129 is about 79.6930424698.

The spelling of 506129 in words is "five hundred six thousand, one hundred twenty-nine".