6481139 has 8 divisors (see below), whose sum is σ = 7646208. Its totient is φ = 5375880.

The previous prime is 6481127. The next prime is 6481141. The reversal of 6481139 is 9311846.

It is a happy number.

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 6481139 - 2¹⁶ = 6415603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6481169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14717 + ... + 15150.

It is an arithmetic number, because the mean of its divisors is an integer number (955776).

Almost surely, 2^6481139 is an apocalyptic number.

6481139 is a deficient number, since it is larger than the sum of its proper divisors (1165069).

6481139 is a wasteful number, since it uses less digits than its factorization.

6481139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29905.

The product of its digits is 5184, while the sum is 32.

The square root of 6481139 is about 2545.8081231703. The cubic root of 6481139 is about 186.4448729822. Note that the first 3 decimals are identical.

The spelling of 6481139 in words is "six million, four hundred eighty-one thousand, one hundred thirty-nine".