6433421 has 2 divisors, whose sum is σ = 6433422. Its totient is φ = 6433420.

The previous prime is 6433409. The next prime is 6433519. The reversal of 6433421 is 1243346.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4141225 + 2292196 = 2035^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 6433421 - 2¹⁰ = 6432397 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6⁶ + 4⁴ + 3¹³ + 3¹⁴ + 4⁵ + 2¹³ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6432421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216710 + 3216711.

It is an arithmetic number, because the mean of its divisors is an integer number (3216711).

Almost surely, 2^6433421 is an apocalyptic number.

It is an amenable number.

6433421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6433421 is an equidigital number, since it uses as much as digits as its factorization.

6433421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 6433421 is about 2536.4189322744. The cubic root of 6433421 is about 185.9861727109.

Adding to 6433421 its reverse (1243346), we get a palindrome (7676767).

The spelling of 6433421 in words is "six million, four hundred thirty-three thousand, four hundred twenty-one".