245523 has 8 divisors (see below), whose sum is σ = 329728. Its totient is φ = 162504.

The previous prime is 245521. The next prime is 245527. The reversal of 245523 is 325542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245523 - 2¹ = 245521 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 4⁷ + 5⁵ + 5⁵ + 2¹⁷ + 3¹⁰ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245523.

It is not an unprimeable number, because it can be changed into a prime (245521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 852.

It is an arithmetic number, because the mean of its divisors is an integer number (41216).

2²⁴⁵⁵²³ is an apocalyptic number.

245523 is a deficient number, since it is larger than the sum of its proper divisors (84205).

245523 is a wasteful number, since it uses less digits than its factorization.

245523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its digits is 1200, while the sum is 21.

The square root of 245523 is about 495.5027749670. The cubic root of 245523 is about 62.6177407213.

It can be divided in two parts, 2455 and 23, that multiplied together give a palindrome (56465).

The spelling of 245523 in words is "two hundred forty-five thousand, five hundred twenty-three".