6421964 has 12 divisors (see below), whose sum is σ = 11500104. Its totient is φ = 3136224.

The previous prime is 6421931. The next prime is 6421967. The reversal of 6421964 is 4691246.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 6³ + 4⁷ + 2 + 1 + 9⁶ + 6⁸ + 4¹¹ .

It is a self number, because there is not a number n which added to its sum of digits gives 6421964.

It is not an unprimeable number, because it can be changed into a prime (6421967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18497 + ... + 18840.

It is an arithmetic number, because the mean of its divisors is an integer number (958342).

Almost surely, 2^6421964 is an apocalyptic number.

It is an amenable number.

6421964 is a deficient number, since it is larger than the sum of its proper divisors (5078140).

6421964 is a wasteful number, since it uses less digits than its factorization.

6421964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37384 (or 37382 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 6421964 is about 2534.1594267133. The cubic root of 6421964 is about 185.8757022089.

The spelling of 6421964 in words is "six million, four hundred twenty-one thousand, nine hundred sixty-four".