7172138 has 8 divisors (see below), whose sum is σ = 10776132. Its totient is φ = 3580096.

The previous prime is 7172131. The next prime is 7172167. The reversal of 7172138 is 8312717.

It can be written as a sum of positive squares in 2 ways, for example, as 5368489 + 1803649 = 2317^2 + 1343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7172138.

It is not an unprimeable number, because it can be changed into a prime (7172131) 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 3 ways as a sum of consecutive naturals, for example, 1295 + ... + 4002.

Almost surely, 2^7172138 is an apocalyptic number.

7172138 is a deficient number, since it is larger than the sum of its proper divisors (3603994).

7172138 is a wasteful number, since it uses less digits than its factorization.

7172138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5976.

The product of its digits is 2352, while the sum is 29.

The square root of 7172138 is about 2678.0847634084. The cubic root of 7172138 is about 192.8484765588.

The spelling of 7172138 in words is "seven million, one hundred seventy-two thousand, one hundred thirty-eight".