6139985 has 8 divisors (see below), whose sum is σ = 7385256. Its totient is φ = 4900480.

The previous prime is 6139979. The next prime is 6139993. The reversal of 6139985 is 5899316.

It can be written as a sum of positive squares in 4 ways, for example, as 9409 + 6130576 = 97^2 + 2476^2 .

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

It is not a de Polignac number, because 6139985 - 2⁶ = 6139921 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 3783.

It is an arithmetic number, because the mean of its divisors is an integer number (923157).

Almost surely, 2^6139985 is an apocalyptic number.

It is an amenable number.

6139985 is a deficient number, since it is larger than the sum of its proper divisors (1245271).

6139985 is a wasteful number, since it uses less digits than its factorization.

6139985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883.

The product of its digits is 58320, while the sum is 41.

The square root of 6139985 is about 2477.8993119173. The cubic root of 6139985 is about 183.1143740413.

The spelling of 6139985 in words is "six million, one hundred thirty-nine thousand, nine hundred eighty-five".