1641042043 has 2 divisors, whose sum is σ = 1641042044. Its totient is φ = 1641042042.

The previous prime is 1641042031. The next prime is 1641042047. The reversal of 1641042043 is 3402401461.

It is a strong prime.

It is an emirp because it is prime and its reverse (3402401461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1641042043 - 2²⁵ = 1607487611 is a prime.

It is a super-2 number, since 2×1641042043² = 5386037973787227698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1641041999 and 1641042017.

It is not a weakly prime, because it can be changed into another prime (1641042047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820521021 + 820521022.

It is an arithmetic number, because the mean of its divisors is an integer number (820521022).

Almost surely, 2^1641042043 is an apocalyptic number.

1641042043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641042043 is an equidigital number, since it uses as much as digits as its factorization.

1641042043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1641042043 is about 40509.7771284908. Note that the first 3 decimals coincide. The cubic root of 1641042043 is about 1179.5234221681.

The spelling of 1641042043 in words is "one billion, six hundred forty-one million, forty-two thousand, forty-three".