6434621 has 2 divisors, whose sum is σ = 6434622. Its totient is φ = 6434620.

The previous prime is 6434579. The next prime is 6434627. The reversal of 6434621 is 1264346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 1322500 = 2261^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 6434621 - 2¹⁸ = 6172477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6434627) 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, 3217310 + 3217311.

It is an arithmetic number, because the mean of its divisors is an integer number (3217311).

Almost surely, 2^6434621 is an apocalyptic number.

It is an amenable number.

6434621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6434621 is an equidigital number, since it uses as much as digits as its factorization.

6434621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 6434621 is about 2536.6554752272. The cubic root of 6434621 is about 185.9977357415.

Adding to 6434621 its reverse (1264346), we get a palindrome (7698967).

The spelling of 6434621 in words is "six million, four hundred thirty-four thousand, six hundred twenty-one".