531243 has 12 divisors (see below), whose sum is σ = 779688. Its totient is φ = 348480.

The previous prime is 531239. The next prime is 531253. The reversal of 531243 is 342135.

It is not a de Polignac number, because 531243 - 2² = 531239 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (531203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (64974).

2⁵³¹²⁴³ is an apocalyptic number.

531243 is a deficient number, since it is larger than the sum of its proper divisors (248445).

531243 is a wasteful number, since it uses less digits than its factorization.

531243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 951 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 531243 is about 728.8641848795. The cubic root of 531243 is about 80.9899393083.

Adding to 531243 its reverse (342135), we get a palindrome (873378).

It can be divided in two parts, 53 and 1243, that added together give a 4-th power (1296 = 6⁴).

The spelling of 531243 in words is "five hundred thirty-one thousand, two hundred forty-three".