245243 has 4 divisors (see below), whose sum is σ = 247728. Its totient is φ = 242760.

The previous prime is 245209. The next prime is 245251. The reversal of 245243 is 342542.

245243 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342542 = 2 ⋅171271.

It is a cyclic number.

It is not a de Polignac number, because 245243 - 2¹⁰ = 244219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242243) 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, 1088 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (61932).

2²⁴⁵²⁴³ is an apocalyptic number.

245243 is a deficient number, since it is larger than the sum of its proper divisors (2485).

245243 is a wasteful number, since it uses less digits than its factorization.

245243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484.

The product of its digits is 960, while the sum is 20.

The square root of 245243 is about 495.2201530633. The cubic root of 245243 is about 62.5939281028.

Adding to 245243 its reverse (342542), we get a palindrome (587785).

The spelling of 245243 in words is "two hundred forty-five thousand, two hundred forty-three".