7166225 has 36 divisors (see below), whose sum is σ = 10291008. Its totient is φ = 4936800.

The previous prime is 7166221. The next prime is 7166227. The reversal of 7166225 is 5226617.

It is not a de Polignac number, because 7166225 - 2² = 7166221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7166221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69524 + ... + 69626.

Almost surely, 2^7166225 is an apocalyptic number.

It is an amenable number.

7166225 is a deficient number, since it is larger than the sum of its proper divisors (3124783).

7166225 is a wasteful number, since it uses less digits than its factorization.

7166225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 142 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 7166225 is about 2676.9805752004. The cubic root of 7166225 is about 192.7954646322.

It can be divided in two parts, 7 and 166225, that multiplied together give a triangular number (1163575 = T₁₅₂₅).

The spelling of 7166225 in words is "seven million, one hundred sixty-six thousand, two hundred twenty-five".