405000041 has 2 divisors, whose sum is σ = 405000042. Its totient is φ = 405000040.

The previous prime is 404999983. The next prime is 405000049. The reversal of 405000041 is 140000504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214007641 + 190992400 = 14629^2 + 13820^2 .

It is a cyclic number.

It is not a de Polignac number, because 405000041 - 2²² = 400805737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (405000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202500020 + 202500021.

It is an arithmetic number, because the mean of its divisors is an integer number (202500021).

Almost surely, 2^405000041 is an apocalyptic number.

It is an amenable number.

405000041 is a deficient number, since it is larger than the sum of its proper divisors (1).

405000041 is an equidigital number, since it uses as much as digits as its factorization.

405000041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 405000041 is about 20124.6128161513. The cubic root of 405000041 is about 739.8636472657.

Adding to 405000041 its reverse (140000504), we get a palindrome (545000545).

The spelling of 405000041 in words is "four hundred five million, forty-one", and thus it is an aban number.