245603 has 4 divisors (see below), whose sum is σ = 246600. Its totient is φ = 244608.

The previous prime is 245593. The next prime is 245621. The reversal of 245603 is 306542.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 306542 = 2 ⋅153271.

It is a cyclic number.

It is not a de Polignac number, because 245603 - 2⁴ = 245587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245653) 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, 176 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (61650).

2²⁴⁵⁶⁰³ is an apocalyptic number.

245603 is a deficient number, since it is larger than the sum of its proper divisors (997).

245603 is an equidigital number, since it uses as much as digits as its factorization.

245603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 245603 is about 495.5834944790. The cubic root of 245603 is about 62.6245410011.

It can be divided in two parts, 245 and 603, that added together give a palindrome (848).

The spelling of 245603 in words is "two hundred forty-five thousand, six hundred three".