6813121 has 8 divisors (see below), whose sum is σ = 7805504. Its totient is φ = 5825520.

The previous prime is 6813113. The next prime is 6813127. The reversal of 6813121 is 1213186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6813121 - 2³ = 6813113 is a prime.

6813121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6813092 and 6813101.

It is not an unprimeable number, because it can be changed into a prime (6813127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2731 + ... + 4591.

It is an arithmetic number, because the mean of its divisors is an integer number (975688).

Almost surely, 2^6813121 is an apocalyptic number.

It is an amenable number.

6813121 is a deficient number, since it is larger than the sum of its proper divisors (992383).

6813121 is a wasteful number, since it uses less digits than its factorization.

6813121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391.

The product of its digits is 288, while the sum is 22.

The square root of 6813121 is about 2610.1955865414. The cubic root of 6813121 is about 189.5754231320.

The spelling of 6813121 in words is "six million, eight hundred thirteen thousand, one hundred twenty-one".