6845621 has 2 divisors, whose sum is σ = 6845622. Its totient is φ = 6845620.

The previous prime is 6845609. The next prime is 6845633. The reversal of 6845621 is 1265486.

It is a balanced prime because it is at equal distance from previous prime (6845609) and next prime (6845633).

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 7396 = 2615^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 6845621 - 2¹⁰ = 6844597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6845821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422810 + 3422811.

It is an arithmetic number, because the mean of its divisors is an integer number (3422811).

Almost surely, 2^6845621 is an apocalyptic number.

It is an amenable number.

6845621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6845621 is an equidigital number, since it uses as much as digits as its factorization.

6845621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 6845621 is about 2616.4137669719. The cubic root of 6845621 is about 189.8763831177.

The spelling of 6845621 in words is "six million, eight hundred forty-five thousand, six hundred twenty-one".