43123541 has 2 divisors, whose sum is σ = 43123542. Its totient is φ = 43123540.

The previous prime is 43123529. The next prime is 43123567. The reversal of 43123541 is 14532134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42706225 + 417316 = 6535^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 43123541 - 2⁶ = 43123477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43123501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561770 + 21561771.

It is an arithmetic number, because the mean of its divisors is an integer number (21561771).

Almost surely, 2^43123541 is an apocalyptic number.

It is an amenable number.

43123541 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123541 is an equidigital number, since it uses as much as digits as its factorization.

43123541 is an evil number, because the sum of its binary digits is even.

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

The square root of 43123541 is about 6566.8516809808. The cubic root of 43123541 is about 350.6749994205.

Adding to 43123541 its reverse (14532134), we get a palindrome (57655675).

The spelling of 43123541 in words is "forty-three million, one hundred twenty-three thousand, five hundred forty-one".