4051643 has 4 divisors (see below), whose sum is σ = 4055880. Its totient is φ = 4047408.

The previous prime is 4051633. The next prime is 4051667. The reversal of 4051643 is 3461504.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4051643 - 2¹⁴ = 4035259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4051603) 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, 71 + ... + 2847.

It is an arithmetic number, because the mean of its divisors is an integer number (1013970).

Almost surely, 2^4051643 is an apocalyptic number.

4051643 is a deficient number, since it is larger than the sum of its proper divisors (4237).

4051643 is a wasteful number, since it uses less digits than its factorization.

4051643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 4051643 is about 2012.8693449899. The cubic root of 4051643 is about 159.4203373772.

It can be divided in two parts, 405 and 1643, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 4051643 in words is "four million, fifty-one thousand, six hundred forty-three".