7172145 has 24 divisors (see below), whose sum is σ = 12894336. Its totient is φ = 3824496.

The previous prime is 7172131. The next prime is 7172167. The reversal of 7172145 is 5412717.

It is not a de Polignac number, because 7172145 - 2²² = 2977841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1737 + ... + 4166.

It is an arithmetic number, because the mean of its divisors is an integer number (537264).

Almost surely, 2^7172145 is an apocalyptic number.

It is an amenable number.

7172145 is a deficient number, since it is larger than the sum of its proper divisors (5722191).

7172145 is an equidigital number, since it uses as much as digits as its factorization.

7172145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923 (or 5911 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 7172145 is about 2678.0860703122. The cubic root of 7172145 is about 192.8485392987.

The spelling of 7172145 in words is "seven million, one hundred seventy-two thousand, one hundred forty-five".