43042081 has 2 divisors, whose sum is σ = 43042082. Its totient is φ = 43042080.

The previous prime is 43042067. The next prime is 43042133. The reversal of 43042081 is 18024034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37015056 + 6027025 = 6084^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 43042081 - 2⁷ = 43041953 is a prime.

It is a super-2 number, since 2×43042081² = 3705241473621122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43042001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521040 + 21521041.

It is an arithmetic number, because the mean of its divisors is an integer number (21521041).

Almost surely, 2^43042081 is an apocalyptic number.

It is an amenable number.

43042081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43042081 is an equidigital number, since it uses as much as digits as its factorization.

43042081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 43042081 is about 6560.6463858373. The cubic root of 43042081 is about 350.4540528821.

The spelling of 43042081 in words is "forty-three million, forty-two thousand, eighty-one".