6172139 has 4 divisors (see below), whose sum is σ = 6535224. Its totient is φ = 5809056.

The previous prime is 6172123. The next prime is 6172147. The reversal of 6172139 is 9312716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6172139 - 2⁴ = 6172123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6172109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181517 + ... + 181550.

It is an arithmetic number, because the mean of its divisors is an integer number (1633806).

Almost surely, 2^6172139 is an apocalyptic number.

6172139 is a deficient number, since it is larger than the sum of its proper divisors (363085).

6172139 is a wasteful number, since it uses less digits than its factorization.

6172139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363084.

The product of its digits is 2268, while the sum is 29.

The square root of 6172139 is about 2484.3789968521. The cubic root of 6172139 is about 183.4334633926.

The spelling of 6172139 in words is "six million, one hundred seventy-two thousand, one hundred thirty-nine".