531266 has 8 divisors (see below), whose sum is σ = 804540. Its totient is φ = 263088.

The previous prime is 531263. The next prime is 531281. The reversal of 531266 is 662135.

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 70225 = 679^2 + 265^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×531266³ = 449839225833387288, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (531263) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1001 + ... + 1436.

2⁵³¹²⁶⁶ is an apocalyptic number.

531266 is a deficient number, since it is larger than the sum of its proper divisors (273274).

531266 is a wasteful number, since it uses less digits than its factorization.

531266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548.

The product of its digits is 1080, while the sum is 23.

The square root of 531266 is about 728.8799626825. The cubic root of 531266 is about 80.9911081028.

It can be divided in two parts, 531 and 266, that multiplied together give a triangular number (141246 = T₅₃₁).

The spelling of 531266 in words is "five hundred thirty-one thousand, two hundred sixty-six".