405401441 has 2 divisors, whose sum is σ = 405401442. Its totient is φ = 405401440.

The previous prime is 405401419. The next prime is 405401467. The reversal of 405401441 is 144104504.

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., 388917841 + 16483600 = 19721^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 405401441 - 2¹⁸ = 405139297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405401641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202700720 + 202700721.

It is an arithmetic number, because the mean of its divisors is an integer number (202700721).

Almost surely, 2^405401441 is an apocalyptic number.

It is an amenable number.

405401441 is a deficient number, since it is larger than the sum of its proper divisors (1).

405401441 is an equidigital number, since it uses as much as digits as its factorization.

405401441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 405401441 is about 20134.5832089964. The cubic root of 405401441 is about 740.1079955605.

Adding to 405401441 its reverse (144104504), we get a palindrome (549505945).

The spelling of 405401441 in words is "four hundred five million, four hundred one thousand, four hundred forty-one".