404145 has 24 divisors (see below), whose sum is σ = 801216. Its totient is φ = 184608.

The previous prime is 404123. The next prime is 404161. The reversal of 404145 is 541404.

It is not a de Polignac number, because 404145 - 2⁵ = 404113 is a prime.

404145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (33384).

2⁴⁰⁴¹⁴⁵ is an apocalyptic number.

404145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

404145 is a deficient number, since it is larger than the sum of its proper divisors (397071).

404145 is a wasteful number, since it uses less digits than its factorization.

404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 404145 is about 635.7239967156. The cubic root of 404145 is about 73.9342610718.

Adding to 404145 its reverse (541404), we get a palindrome (945549).

The spelling of 404145 in words is "four hundred four thousand, one hundred forty-five".