405803401 has 4 divisors (see below), whose sum is σ = 406459600. Its totient is φ = 405147204.

The previous prime is 405803399. The next prime is 405803407. The reversal of 405803401 is 104308504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405803401 - 2¹ = 405803399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405803407) 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, 327171 + ... + 328408.

It is an arithmetic number, because the mean of its divisors is an integer number (101614900).

Almost surely, 2^405803401 is an apocalyptic number.

It is an amenable number.

405803401 is a deficient number, since it is larger than the sum of its proper divisors (656199).

405803401 is an equidigital number, since it uses as much as digits as its factorization.

405803401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656198.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 405803401 is about 20144.5625666084. The cubic root of 405803401 is about 740.3525231745.

The spelling of 405803401 in words is "four hundred five million, eight hundred three thousand, four hundred one".