225420145 has 8 divisors (see below), whose sum is σ = 271181160. Its totient is φ = 179884800.

The previous prime is 225420137. The next prime is 225420149. The reversal of 225420145 is 541024522.

225420145 = 10616² + 10617².

It can be written as a sum of positive squares in 4 ways, for example, as 112720689 + 112699456 = 10617^2 + 10616^2 .

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

It is not a de Polignac number, because 225420145 - 2³ = 225420137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225420149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54210 + ... + 58219.

It is an arithmetic number, because the mean of its divisors is an integer number (33897645).

Almost surely, 2^225420145 is an apocalyptic number.

225420145 is the 10617-th centered square number.

It is an amenable number.

225420145 is a deficient number, since it is larger than the sum of its proper divisors (45761015).

225420145 is a wasteful number, since it uses less digits than its factorization.

225420145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112835.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 225420145 is about 15013.9983015851. The cubic root of 225420145 is about 608.5985429389.

Adding to 225420145 its reverse (541024522), we get a palindrome (766444667).

The spelling of 225420145 in words is "two hundred twenty-five million, four hundred twenty thousand, one hundred forty-five".