225242 has 4 divisors (see below), whose sum is σ = 337866. Its totient is φ = 112620.

The previous prime is 225241. The next prime is 225257. The reversal of 225242 is 242522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 72361 = 391^2 + 269^2 .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 225242.

It is not an unprimeable number, because it can be changed into a prime (225241) 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 as a sum of consecutive naturals, namely, 56309 + ... + 56312.

2²²⁵²⁴² is an apocalyptic number.

225242 is a deficient number, since it is larger than the sum of its proper divisors (112624).

225242 is a wasteful number, since it uses less digits than its factorization.

225242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112623.

The product of its digits is 320, while the sum is 17.

The square root of 225242 is about 474.5966708691. The cubic root of 225242 is about 60.8438179631.

Adding to 225242 its reverse (242522), we get a palindrome (467764).

The spelling of 225242 in words is "two hundred twenty-five thousand, two hundred forty-two".