1005404 has 12 divisors (see below), whose sum is σ = 1852200. Its totient is φ = 476208.

The previous prime is 1005391. The next prime is 1005409. The reversal of 1005404 is 4045001.

1005404 = 351² + 352² + ... + 358².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6539 + ... + 6690.

It is an arithmetic number, because the mean of its divisors is an integer number (154350).

2^1005404 is an apocalyptic number.

It is an amenable number.

1005404 is a deficient number, since it is larger than the sum of its proper divisors (846796).

1005404 is a wasteful number, since it uses less digits than its factorization.

1005404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13252 (or 13250 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1005404 is about 1002.6983594282. The cubic root of 1005404 is about 100.1798098238.

The spelling of 1005404 in words is "one million, five thousand, four hundred four".