531478 has 4 divisors (see below), whose sum is σ = 797220. Its totient is φ = 265738.

The previous prime is 531457. The next prime is 531481. The reversal of 531478 is 874135.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 5 + 3¹² + 4² + 1 + 7 + 8 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132868 + ... + 132871.

It is an arithmetic number, because the mean of its divisors is an integer number (199305).

2⁵³¹⁴⁷⁸ is an apocalyptic number.

531478 is a deficient number, since it is larger than the sum of its proper divisors (265742).

531478 is a wasteful number, since it uses less digits than its factorization.

531478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265741.

The product of its digits is 3360, while the sum is 28.

The square root of 531478 is about 729.0253767874. The cubic root of 531478 is about 81.0018797511.

The spelling of 531478 in words is "five hundred thirty-one thousand, four hundred seventy-eight".