7225745 has 4 divisors (see below), whose sum is σ = 8670900. Its totient is φ = 5780592.

The previous prime is 7225739. The next prime is 7225747. The reversal of 7225745 is 5475227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 4426816 = 1673^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 7225745 - 2⁸ = 7225489 is a prime.

It is a super-2 number, since 2×7225745² = 104422781610050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7225747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722570 + ... + 722579.

It is an arithmetic number, because the mean of its divisors is an integer number (2167725).

Almost surely, 2^7225745 is an apocalyptic number.

It is an amenable number.

7225745 is a deficient number, since it is larger than the sum of its proper divisors (1445155).

7225745 is a wasteful number, since it uses less digits than its factorization.

7225745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445154.

The product of its digits is 19600, while the sum is 32.

The square root of 7225745 is about 2688.0745897389. The cubic root of 7225745 is about 193.3277561477.

The spelling of 7225745 in words is "seven million, two hundred twenty-five thousand, seven hundred forty-five".