7225785 has 72 divisors (see below), whose sum is σ = 15205320. Its totient is φ = 3161088.

The previous prime is 7225783. The next prime is 7225793. The reversal of 7225785 is 5875227.

7225785 is nontrivially palindromic in base 4.

7225785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 441 + 7225344 = 21^2 + 2688^2 .

It is not a de Polignac number, because 7225785 - 2¹ = 7225783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7225781) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 63889 + ... + 64001.

It is an arithmetic number, because the mean of its divisors is an integer number (211185).

Almost surely, 2^7225785 is an apocalyptic number.

It is an amenable number.

7225785 is an abundant number, since it is smaller than the sum of its proper divisors (7979535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7225785 is a wasteful number, since it uses less digits than its factorization.

7225785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 157 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 7225785 is about 2688.0820299983. The cubic root of 7225785 is about 193.3281128859.

The spelling of 7225785 in words is "seven million, two hundred twenty-five thousand, seven hundred eighty-five".