404861 has 4 divisors (see below), whose sum is σ = 409500. Its totient is φ = 400224.

The previous prime is 404851. The next prime is 404941. The reversal of 404861 is 168404.

It is a happy number.

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 184900 + 219961 = 430^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 404861 - 2¹⁴ = 388477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404851) 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, 2186 + ... + 2363.

It is an arithmetic number, because the mean of its divisors is an integer number (102375).

2⁴⁰⁴⁸⁶¹ is an apocalyptic number.

It is an amenable number.

404861 is a deficient number, since it is larger than the sum of its proper divisors (4639).

404861 is an equidigital number, since it uses as much as digits as its factorization.

404861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 404861 is about 636.2868849819. The cubic root of 404861 is about 73.9778969780.

The spelling of 404861 in words is "four hundred four thousand, eight hundred sixty-one".