404771 has 4 divisors (see below), whose sum is σ = 410544. Its totient is φ = 399000.

The previous prime is 404713. The next prime is 404773. The reversal of 404771 is 177404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404773) 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, 2780 + ... + 2921.

It is an arithmetic number, because the mean of its divisors is an integer number (102636).

2⁴⁰⁴⁷⁷¹ is an apocalyptic number.

404771 is a deficient number, since it is larger than the sum of its proper divisors (5773).

404771 is an equidigital number, since it uses as much as digits as its factorization.

404771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 404771 is about 636.2161582355. The cubic root of 404771 is about 73.9724148461.

The spelling of 404771 in words is "four hundred four thousand, seven hundred seventy-one", and thus it is an iban number.