7420225 has 12 divisors (see below), whose sum is σ = 9241596. Its totient is φ = 5910080.

The previous prime is 7420213. The next prime is 7420243. The reversal of 7420225 is 5220247.

It can be written as a sum of positive squares in 6 ways, for example, as 408321 + 7011904 = 639^2 + 2648^2 .

It is not a de Polignac number, because 7420225 - 2⁷ = 7420097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7420196 and 7420205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6819 + ... + 7831.

It is an arithmetic number, because the mean of its divisors is an integer number (770133).

Almost surely, 2^7420225 is an apocalyptic number.

It is an amenable number.

7420225 is a deficient number, since it is larger than the sum of its proper divisors (1821371).

7420225 is a wasteful number, since it uses less digits than its factorization.

7420225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 7420225 is about 2724.0089941114. The cubic root of 7420225 is about 195.0468876949.

Adding to 7420225 its sum of digits (22), we get a palindrome (7420247).

The spelling of 7420225 in words is "seven million, four hundred twenty thousand, two hundred twenty-five".