247045 has 4 divisors (see below), whose sum is σ = 296460. Its totient is φ = 197632.

The previous prime is 247031. The next prime is 247067. The reversal of 247045 is 540742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540742 = 2 ⋅270371.

It can be written as a sum of positive squares in 2 ways, for example, as 91809 + 155236 = 303^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 247045 - 2¹¹ = 244997 is a prime.

It is a super-2 number, since 2×247045² = 122062464050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24700 + ... + 24709.

It is an arithmetic number, because the mean of its divisors is an integer number (74115).

2²⁴⁷⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

247045 is a deficient number, since it is larger than the sum of its proper divisors (49415).

247045 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 8 representation: 247045 = (742405)₈.

247045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49414.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 247045 is about 497.0362159843. The cubic root of 247045 is about 62.7468636496.

Adding to 247045 its reverse (540742), we get a palindrome (787787).

The spelling of 247045 in words is "two hundred forty-seven thousand, forty-five".