642225 has 12 divisors (see below), whose sum is σ = 1061936. Its totient is φ = 342480.

The previous prime is 642223. The next prime is 642233. The reversal of 642225 is 522246.

642225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642225 - 2¹ = 642223 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 4⁵ + 2¹² + 2¹⁶ + 2¹⁹ + 5⁴ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4207 + ... + 4356.

2⁶⁴²²²⁵ is an apocalyptic number.

It is an amenable number.

642225 is a deficient number, since it is larger than the sum of its proper divisors (419711).

642225 is a wasteful number, since it uses less digits than its factorization.

642225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8576 (or 8571 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 642225 is about 801.3894184477. The cubic root of 642225 is about 86.2771391177.

Adding to 642225 its sum of digits (21), we get a palindrome (642246).

The spelling of 642225 in words is "six hundred forty-two thousand, two hundred twenty-five".