6195421 has 2 divisors, whose sum is σ = 6195422. Its totient is φ = 6195420.

The previous prime is 6195419. The next prime is 6195439. The reversal of 6195421 is 1245916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5904900 + 290521 = 2430^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 6195421 - 2¹ = 6195419 is a prime.

Together with 6195419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6195421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6195401) 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, 3097710 + 3097711.

It is an arithmetic number, because the mean of its divisors is an integer number (3097711).

Almost surely, 2^6195421 is an apocalyptic number.

It is an amenable number.

6195421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6195421 is an equidigital number, since it uses as much as digits as its factorization.

6195421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 6195421 is about 2489.0602644372. The cubic root of 6195421 is about 183.6638178542.

The spelling of 6195421 in words is "six million, one hundred ninety-five thousand, four hundred twenty-one".