6998225 has 24 divisors (see below), whose sum is σ = 9525432. Its totient is φ = 5068800.

The previous prime is 6998221. The next prime is 6998261. The reversal of 6998225 is 5228996.

It can be written as a sum of positive squares in 12 ways, for example, as 5438224 + 1560001 = 2332^2 + 1249^2 .

It is not a de Polignac number, because 6998225 - 2² = 6998221 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (77760) is a multiple of the sum of its prime divisors (432).

It is not an unprimeable number, because it can be changed into a prime (6998221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19649 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (396893).

Almost surely, 2^6998225 is an apocalyptic number.

6998225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6998225 is a deficient number, since it is larger than the sum of its proper divisors (2527207).

6998225 is a wasteful number, since it uses less digits than its factorization.

6998225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 432 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 6998225 is about 2645.4158463274. The cubic root of 6998225 is about 191.2769480873.

It can be divided in two parts, 69982 and 25, that added together give a palindrome (70007).

The spelling of 6998225 in words is "six million, nine hundred ninety-eight thousand, two hundred twenty-five".