531404 has 6 divisors (see below), whose sum is σ = 929964. Its totient is φ = 265700.

The previous prime is 531383. The next prime is 531457. The reversal of 531404 is 404135.

It is a super-2 number, since 2×531404² = 564780422432, which contains 22 as substring.

It is a zygodrome in base 3.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66422 + ... + 66429.

It is an arithmetic number, because the mean of its divisors is an integer number (154994).

2⁵³¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

531404 is a deficient number, since it is larger than the sum of its proper divisors (398560).

531404 is a wasteful number, since it uses less digits than its factorization.

531404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132855 (or 132853 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 531404 is about 728.9746223292. The cubic root of 531404 is about 80.9981201616.

Adding to 531404 its reverse (404135), we get a palindrome (935539).

The spelling of 531404 in words is "five hundred thirty-one thousand, four hundred four".