7172505 has 12 divisors (see below), whose sum is σ = 12432420. Its totient is φ = 3825312.

The previous prime is 7172497. The next prime is 7172507. The reversal of 7172505 is 5052717.

It can be written as a sum of positive squares in 2 ways, for example, as 4822416 + 2350089 = 2196^2 + 1533^2 .

It is not a de Polignac number, because 7172505 - 2³ = 7172497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7172507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79650 + ... + 79739.

It is an arithmetic number, because the mean of its divisors is an integer number (1036035).

Almost surely, 2^7172505 is an apocalyptic number.

It is an amenable number.

7172505 is a deficient number, since it is larger than the sum of its proper divisors (5259915).

7172505 is a wasteful number, since it uses less digits than its factorization.

7172505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159400 (or 159397 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 7172505 is about 2678.1532816476. The cubic root of 7172505 is about 192.8517658701.

The spelling of 7172505 in words is "seven million, one hundred seventy-two thousand, five hundred five".