6978225 has 48 divisors (see below), whose sum is σ = 12499200. Its totient is φ = 3424320.

The previous prime is 6978221. The next prime is 6978227. The reversal of 6978225 is 5228796.

It is a happy number.

It is not a de Polignac number, because 6978225 - 2² = 6978221 is a prime.

It is a d-powerful number, because it can be written as 6³ + 9⁷ + 7³ + 8⁷ + 2¹⁴ + 2¹⁶ + 5⁶ .

6978225 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6978221) 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 47 ways as a sum of consecutive naturals, for example, 84034 + ... + 84116.

It is an arithmetic number, because the mean of its divisors is an integer number (260400).

Almost surely, 2^6978225 is an apocalyptic number.

It is an amenable number.

6978225 is a deficient number, since it is larger than the sum of its proper divisors (5520975).

6978225 is a wasteful number, since it uses less digits than its factorization.

6978225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 169 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 6978225 is about 2641.6330176616. The cubic root of 6978225 is about 191.0945595029.

The spelling of 6978225 in words is "six million, nine hundred seventy-eight thousand, two hundred twenty-five".