247795 has 4 divisors (see below), whose sum is σ = 297360. Its totient is φ = 198232.

The previous prime is 247781. The next prime is 247799. The reversal of 247795 is 597742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247795 - 2¹¹ = 245747 is a prime.

It is a super-2 number, since 2×247795² = 122804724050, which contains 22 as substring.

247795 is a lucky number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 247795.

It is not an unprimeable number, because it can be changed into a prime (247799) 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, 24775 + ... + 24784.

It is an arithmetic number, because the mean of its divisors is an integer number (74340).

2²⁴⁷⁷⁹⁵ is an apocalyptic number.

247795 is a deficient number, since it is larger than the sum of its proper divisors (49565).

247795 is an equidigital number, since it uses as much as digits as its factorization.

247795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49564.

The product of its digits is 17640, while the sum is 34.

The square root of 247795 is about 497.7901164145. The cubic root of 247795 is about 62.8102969038.

The spelling of 247795 in words is "two hundred forty-seven thousand, seven hundred ninety-five".