505147 has 4 divisors (see below), whose sum is σ = 509976. Its totient is φ = 500320.

The previous prime is 505139. The next prime is 505157. The reversal of 505147 is 741505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741505 = 5 ⋅148301.

It is a cyclic number.

It is not a de Polignac number, because 505147 - 2³ = 505139 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254 + ... + 2467.

It is an arithmetic number, because the mean of its divisors is an integer number (127494).

2⁵⁰⁵¹⁴⁷ is an apocalyptic number.

505147 is a deficient number, since it is larger than the sum of its proper divisors (4829).

505147 is a wasteful number, since it uses less digits than its factorization.

505147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 505147 is about 710.7369414910. The cubic root of 505147 is about 79.6414685067.

The spelling of 505147 in words is "five hundred five thousand, one hundred forty-seven".