6914221 has 4 divisors (see below), whose sum is σ = 7044732. Its totient is φ = 6783712.

The previous prime is 6914213. The next prime is 6914251. The reversal of 6914221 is 1224196.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5616900 + 1297321 = 2370^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 6914221 - 2³ = 6914213 is a prime.

It is a Duffinian number.

6914221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6914251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65176 + ... + 65281.

It is an arithmetic number, because the mean of its divisors is an integer number (1761183).

Almost surely, 2^6914221 is an apocalyptic number.

It is an amenable number.

6914221 is a deficient number, since it is larger than the sum of its proper divisors (130511).

6914221 is a wasteful number, since it uses less digits than its factorization.

6914221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130510.

The product of its digits is 864, while the sum is 25.

The square root of 6914221 is about 2629.4906350851. The cubic root of 6914221 is about 190.5085269317.

Subtracting from 6914221 its sum of digits (25), we obtain a palindrome (6914196).

The spelling of 6914221 in words is "six million, nine hundred fourteen thousand, two hundred twenty-one".