6171985 has 8 divisors (see below), whose sum is σ = 7444800. Its totient is φ = 4911984.

The previous prime is 6171967. The next prime is 6172021. The reversal of 6171985 is 5891716.

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

It is a cyclic number.

It is not a de Polignac number, because 6171985 - 2⁵ = 6171953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107 + ... + 4096.

It is an arithmetic number, because the mean of its divisors is an integer number (930600).

Almost surely, 2^6171985 is an apocalyptic number.

It is an amenable number.

6171985 is a deficient number, since it is larger than the sum of its proper divisors (1272815).

6171985 is a wasteful number, since it uses less digits than its factorization.

6171985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6407.

The product of its digits is 15120, while the sum is 37.

The square root of 6171985 is about 2484.3480029980. The cubic root of 6171985 is about 183.4319377741.

It can be divided in two parts, 6 and 171985, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 6171985 in words is "six million, one hundred seventy-one thousand, nine hundred eighty-five".