505247 has 4 divisors (see below), whose sum is σ = 512856. Its totient is φ = 497640.

The previous prime is 505237. The next prime is 505277. The reversal of 505247 is 742505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742505 = 5 ⋅148501.

It is a cyclic number.

It is not a de Polignac number, because 505247 - 2⁴ = 505231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505247.

It is not an unprimeable number, because it can be changed into a prime (505237) 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, 3704 + ... + 3837.

It is an arithmetic number, because the mean of its divisors is an integer number (128214).

2⁵⁰⁵²⁴⁷ is an apocalyptic number.

505247 is a deficient number, since it is larger than the sum of its proper divisors (7609).

505247 is an equidigital number, since it uses as much as digits as its factorization.

505247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7608.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 505247 is about 710.8072875260. The cubic root of 505247 is about 79.6467234927.

The spelling of 505247 in words is "five hundred five thousand, two hundred forty-seven".