7421643 has 12 divisors (see below), whose sum is σ = 10923120. Its totient is φ = 4854096.

The previous prime is 7421641. The next prime is 7421677. The reversal of 7421643 is 3461247.

7421643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7421643 - 2¹ = 7421641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7421641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7303 + ... + 8256.

It is an arithmetic number, because the mean of its divisors is an integer number (910260).

Almost surely, 2^7421643 is an apocalyptic number.

7421643 is a deficient number, since it is larger than the sum of its proper divisors (3501477).

7421643 is a wasteful number, since it uses less digits than its factorization.

7421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15618 (or 15615 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 7421643 is about 2724.2692598200. The cubic root of 7421643 is about 195.0593113465.

The spelling of 7421643 in words is "seven million, four hundred twenty-one thousand, six hundred forty-three".