6421346 has 4 divisors (see below), whose sum is σ = 9632022. Its totient is φ = 3210672.

The previous prime is 6421343. The next prime is 6421351. The reversal of 6421346 is 6431246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6431246 = 2 ⋅3215623.

It can be written as a sum of positive squares in only one way, i.e., 5707321 + 714025 = 2389^2 + 845^2 .

It is a d-powerful number, because it can be written as 6⁵ + 4² + 2¹³ + 1 + 3¹² + 4¹¹ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (6421343) 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, 1605335 + ... + 1605338.

Almost surely, 2^6421346 is an apocalyptic number.

6421346 is the 1355-th centered heptagonal number.

6421346 is a deficient number, since it is larger than the sum of its proper divisors (3210676).

6421346 is a wasteful number, since it uses less digits than its factorization.

6421346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210675.

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

The square root of 6421346 is about 2534.0374898568. The cubic root of 6421346 is about 185.8697396057.

The spelling of 6421346 in words is "six million, four hundred twenty-one thousand, three hundred forty-six".