6987215 has 4 divisors (see below), whose sum is σ = 8384664. Its totient is φ = 5589768.

The previous prime is 6987203. The next prime is 6987241. The reversal of 6987215 is 5127896.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6987215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698717 + ... + 698726.

It is an arithmetic number, because the mean of its divisors is an integer number (2096166).

Almost surely, 2^6987215 is an apocalyptic number.

6987215 is a deficient number, since it is larger than the sum of its proper divisors (1397449).

6987215 is a wasteful number, since it uses less digits than its factorization.

6987215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397448.

The product of its digits is 30240, while the sum is 38.

The square root of 6987215 is about 2643.3340689364. The cubic root of 6987215 is about 191.1765862304.

The spelling of 6987215 in words is "six million, nine hundred eighty-seven thousand, two hundred fifteen".