6861487 has 8 divisors (see below), whose sum is σ = 7136640. Its totient is φ = 6588960.

The previous prime is 6861479. The next prime is 6861493. The reversal of 6861487 is 7841686.

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 6861487 - 2³ = 6861479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861427) 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, 5937 + ... + 6997.

It is an arithmetic number, because the mean of its divisors is an integer number (892080).

Almost surely, 2^6861487 is an apocalyptic number.

6861487 is a deficient number, since it is larger than the sum of its proper divisors (275153).

6861487 is a wasteful number, since it uses less digits than its factorization.

6861487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313.

The product of its digits is 64512, while the sum is 40.

The square root of 6861487 is about 2619.4440249793. Note that the first 3 decimals coincide. The cubic root of 6861487 is about 190.0229612140.

The spelling of 6861487 in words is "six million, eight hundred sixty-one thousand, four hundred eighty-seven".