405808201 has 4 divisors (see below), whose sum is σ = 415706004. Its totient is φ = 395910400.

The previous prime is 405808189. The next prime is 405808217. The reversal of 405808201 is 102808504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40960000 + 364848201 = 6400^2 + 19101^2 .

It is a cyclic number.

It is not a de Polignac number, because 405808201 - 2¹¹ = 405806153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405808201.

It is not an unprimeable number, because it can be changed into a prime (405808901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4948840 + ... + 4948921.

It is an arithmetic number, because the mean of its divisors is an integer number (103926501).

Almost surely, 2^405808201 is an apocalyptic number.

405808201 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

405808201 is a deficient number, since it is larger than the sum of its proper divisors (9897803).

405808201 is an equidigital number, since it uses as much as digits as its factorization.

405808201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897802.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 405808201 is about 20144.6817051052. The cubic root of 405808201 is about 740.3554422219.

The spelling of 405808201 in words is "four hundred five million, eight hundred eight thousand, two hundred one".