531128 has 16 divisors (see below), whose sum is σ = 1072680. Its totient is φ = 245088.

The previous prime is 531121. The next prime is 531133. The reversal of 531128 is 821135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531121) 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, 2450 + ... + 2657.

2⁵³¹¹²⁸ is an apocalyptic number.

It is an amenable number.

531128 is an abundant number, since it is smaller than the sum of its proper divisors (541552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531128 is a wasteful number, since it uses less digits than its factorization.

531128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126 (or 5122 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 531128 is about 728.7852907407. The cubic root of 531128 is about 80.9840948296.

The spelling of 531128 in words is "five hundred thirty-one thousand, one hundred twenty-eight".