7280225 has 6 divisors (see below), whose sum is σ = 9027510. Its totient is φ = 5824160.

The previous prime is 7280197. The next prime is 7280263. The reversal of 7280225 is 5220827.

It can be written as a sum of positive squares in 3 ways, for example, as 473344 + 6806881 = 688^2 + 2609^2 .

It is not a de Polignac number, because 7280225 - 2⁸ = 7279969 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7280194 and 7280203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145580 + ... + 145629.

It is an arithmetic number, because the mean of its divisors is an integer number (1504585).

Almost surely, 2^7280225 is an apocalyptic number.

It is an amenable number.

7280225 is a deficient number, since it is larger than the sum of its proper divisors (1747285).

7280225 is a wasteful number, since it uses less digits than its factorization.

7280225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291219 (or 291214 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 7280225 is about 2698.1892075983. The cubic root of 7280225 is about 193.8124183214.

It can be divided in two parts, 72802 and 25, that added together give a palindrome (72827).

The spelling of 7280225 in words is "seven million, two hundred eighty thousand, two hundred twenty-five".