6891225 has 24 divisors (see below), whose sum is σ = 12430752. Its totient is φ = 3340800.

The previous prime is 6891221. The next prime is 6891251. The reversal of 6891225 is 5221986.

It is not a de Polignac number, because 6891225 - 2² = 6891221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (6891221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3352 + ... + 5001.

It is an arithmetic number, because the mean of its divisors is an integer number (517948).

Almost surely, 2^6891225 is an apocalyptic number.

It is an amenable number.

6891225 is a deficient number, since it is larger than the sum of its proper divisors (5539527).

6891225 is a wasteful number, since it uses less digits than its factorization.

6891225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8377 (or 8372 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 6891225 is about 2625.1142832265. The cubic root of 6891225 is about 190.2970883171.

The spelling of 6891225 in words is "six million, eight hundred ninety-one thousand, two hundred twenty-five".