6422981 has 2 divisors, whose sum is σ = 6422982. Its totient is φ = 6422980.

The previous prime is 6422959. The next prime is 6422989. The reversal of 6422981 is 1892246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5134756 + 1288225 = 2266^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6422981 is a prime.

It is a super-2 number, since 2×6422981² = 82509369852722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6422989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211490 + 3211491.

It is an arithmetic number, because the mean of its divisors is an integer number (3211491).

Almost surely, 2^6422981 is an apocalyptic number.

It is an amenable number.

6422981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6422981 is an equidigital number, since it uses as much as digits as its factorization.

6422981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 6422981 is about 2534.3600770214. The cubic root of 6422981 is about 185.8855136212.

The spelling of 6422981 in words is "six million, four hundred twenty-two thousand, nine hundred eighty-one".