405243043 has 2 divisors, whose sum is σ = 405243044. Its totient is φ = 405243042.

The previous prime is 405243037. The next prime is 405243107. The reversal of 405243043 is 340342504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405243043 - 2⁹ = 405242531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405242999 and 405243017.

It is not a weakly prime, because it can be changed into another prime (405243023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202621521 + 202621522.

It is an arithmetic number, because the mean of its divisors is an integer number (202621522).

Almost surely, 2^405243043 is an apocalyptic number.

405243043 is a deficient number, since it is larger than the sum of its proper divisors (1).

405243043 is an equidigital number, since it uses as much as digits as its factorization.

405243043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 405243043 is about 20130.6493437246. The cubic root of 405243043 is about 740.0115916129.

Adding to 405243043 its reverse (340342504), we get a palindrome (745585547).

The spelling of 405243043 in words is "four hundred five million, two hundred forty-three thousand, forty-three".