404121 has 4 divisors (see below), whose sum is σ = 538832. Its totient is φ = 269412.

The previous prime is 404119. The next prime is 404123. The reversal of 404121 is 121404.

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 an interprime number because it is at equal distance from previous prime (404119) and next prime (404123).

It is not a de Polignac number, because 404121 - 2¹ = 404119 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404097 and 404106.

It is not an unprimeable number, because it can be changed into a prime (404123) 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, 67351 + ... + 67356.

It is an arithmetic number, because the mean of its divisors is an integer number (134708).

2⁴⁰⁴¹²¹ is an apocalyptic number.

It is an amenable number.

404121 is a deficient number, since it is larger than the sum of its proper divisors (134711).

404121 is a wasteful number, since it uses less digits than its factorization.

404121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134710.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 404121 is about 635.7051203192. The cubic root of 404121 is about 73.9327975233.

Adding to 404121 its reverse (121404), we get a palindrome (525525).

It can be divided in two parts, 404 and 121, that multiplied together give a palindrome (48884).

The spelling of 404121 in words is "four hundred four thousand, one hundred twenty-one", and thus it is an iban number.