6421127 has 2 divisors, whose sum is σ = 6421128. Its totient is φ = 6421126.

The previous prime is 6421111. The next prime is 6421139. The reversal of 6421127 is 7211246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421127 - 2⁴ = 6421111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6421157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210563 + 3210564.

It is an arithmetic number, because the mean of its divisors is an integer number (3210564).

Almost surely, 2^6421127 is an apocalyptic number.

6421127 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421127 is an equidigital number, since it uses as much as digits as its factorization.

6421127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 6421127 is about 2533.9942778152. The cubic root of 6421127 is about 185.8676265526.

The spelling of 6421127 in words is "six million, four hundred twenty-one thousand, one hundred twenty-seven".