245522 has 4 divisors (see below), whose sum is σ = 368286. Its totient is φ = 122760.

The previous prime is 245521. The next prime is 245527. The reversal of 245522 is 225542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225542 = 2 ⋅112771.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 14161 = 481^2 + 119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 245494 and 245503.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245522.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61379 + ... + 61382.

2²⁴⁵⁵²² is an apocalyptic number.

245522 is a deficient number, since it is larger than the sum of its proper divisors (122764).

245522 is a wasteful number, since it uses less digits than its factorization.

245522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122763.

The product of its digits is 800, while the sum is 20.

The square root of 245522 is about 495.5017658899. The cubic root of 245522 is about 62.6176557085.

Adding to 245522 its sum of digits (20), we get a palindrome (245542).

It can be divided in two parts, 245 and 522, that added together give a palindrome (767).

The spelling of 245522 in words is "two hundred forty-five thousand, five hundred twenty-two".