405067561 has 2 divisors, whose sum is σ = 405067562. Its totient is φ = 405067560.

The previous prime is 405067549. The next prime is 405067609. The reversal of 405067561 is 165760504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336906025 + 68161536 = 18355^2 + 8256^2 .

It is a cyclic number.

It is not a de Polignac number, because 405067561 - 2⁵ = 405067529 is a prime.

It is not a weakly prime, because it can be changed into another prime (405067501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202533780 + 202533781.

It is an arithmetic number, because the mean of its divisors is an integer number (202533781).

Almost surely, 2^405067561 is an apocalyptic number.

It is an amenable number.

405067561 is a deficient number, since it is larger than the sum of its proper divisors (1).

405067561 is an equidigital number, since it uses as much as digits as its factorization.

405067561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 405067561 is about 20126.2902940408. The cubic root of 405067561 is about 739.9047606917.

The spelling of 405067561 in words is "four hundred five million, sixty-seven thousand, five hundred sixty-one".