4081543 has 2 divisors, whose sum is σ = 4081544. Its totient is φ = 4081542.

The previous prime is 4081541. The next prime is 4081549. The reversal of 4081543 is 3451804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4081543 - 2¹ = 4081541 is a prime.

Together with 4081541, it forms a pair of twin primes.

4081543 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4081541) 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, 2040771 + 2040772.

It is an arithmetic number, because the mean of its divisors is an integer number (2040772).

Almost surely, 2^4081543 is an apocalyptic number.

4081543 is a deficient number, since it is larger than the sum of its proper divisors (1).

4081543 is an equidigital number, since it uses as much as digits as its factorization.

4081543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4081543 is about 2020.2829009819. The cubic root of 4081543 is about 159.8115359077.

It can be divided in two parts, 4081 and 543, that added together give a square (4624 = 68²).

The spelling of 4081543 in words is "four million, eighty-one thousand, five hundred forty-three".