6815972 has 6 divisors (see below), whose sum is σ = 11927958. Its totient is φ = 3407984.

The previous prime is 6815971. The next prime is 6816011. The reversal of 6815972 is 2795186.

It can be written as a sum of positive squares in only one way, i.e., 4553956 + 2262016 = 2134^2 + 1504^2 .

It is not an unprimeable number, because it can be changed into a prime (6815971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 851993 + ... + 852000.

It is an arithmetic number, because the mean of its divisors is an integer number (1987993).

Almost surely, 2^6815972 is an apocalyptic number.

It is an amenable number.

6815972 is a deficient number, since it is larger than the sum of its proper divisors (5111986).

6815972 is a wasteful number, since it uses less digits than its factorization.

6815972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703997 (or 1703995 counting only the distinct ones).

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

The square root of 6815972 is about 2610.7416570775. The cubic root of 6815972 is about 189.6018625156.

The spelling of 6815972 in words is "six million, eight hundred fifteen thousand, nine hundred seventy-two".