405041111 has 2 divisors, whose sum is σ = 405041112. Its totient is φ = 405041110.

The previous prime is 405041089. The next prime is 405041129. The reversal of 405041111 is 111140504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405041111 - 2¹⁴ = 405024727 is a prime.

It is a super-2 number, since 2×405041111² = 328116603200228642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405041111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405041191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202520555 + 202520556.

It is an arithmetic number, because the mean of its divisors is an integer number (202520556).

Almost surely, 2^405041111 is an apocalyptic number.

405041111 is a deficient number, since it is larger than the sum of its proper divisors (1).

405041111 is an equidigital number, since it uses as much as digits as its factorization.

405041111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 405041111 is about 20125.6331825858. The cubic root of 405041111 is about 739.8886556360. Note that the first 3 decimals are identical.

Adding to 405041111 its reverse (111140504), we get a palindrome (516181615).

It can be divided in two parts, 40504 and 1111, that multiplied together give a palindrome (44999944).

The spelling of 405041111 in words is "four hundred five million, forty-one thousand, one hundred eleven".