4056643 has 4 divisors (see below), whose sum is σ = 4166320. Its totient is φ = 3946968.

The previous prime is 4056641. The next prime is 4056697. The reversal of 4056643 is 3466504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4056643 - 2¹ = 4056641 is a prime.

It is a Duffinian number.

4056643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4056641) 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 in 3 ways as a sum of consecutive naturals, for example, 54783 + ... + 54856.

It is an arithmetic number, because the mean of its divisors is an integer number (1041580).

Almost surely, 2^4056643 is an apocalyptic number.

4056643 is a deficient number, since it is larger than the sum of its proper divisors (109677).

4056643 is a wasteful number, since it uses less digits than its factorization.

4056643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109676.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 4056643 is about 2014.1109701305. The cubic root of 4056643 is about 159.4858888929.

The spelling of 4056643 in words is "four million, fifty-six thousand, six hundred forty-three".