531450 has 36 divisors (see below), whose sum is σ = 1429038. Its totient is φ = 141600.

The previous prime is 531383. The next prime is 531457. The reversal of 531450 is 54135.

It can be written as a sum of positive squares in 3 ways, for example, as 488601 + 42849 = 699^2 + 207^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (531457) by changing a digit.

531450 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 141 + ... + 1040.

2⁵³¹⁴⁵⁰ is an apocalyptic number.

531450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 531450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714519).

531450 is an abundant number, since it is smaller than the sum of its proper divisors (897588).

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

531450 is a wasteful number, since it uses less digits than its factorization.

531450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 531450 is about 729.0061728134. The cubic root of 531450 is about 81.0004572448. Note that the first 3 decimals are identical.

Adding to 531450 its reverse (54135), we get a palindrome (585585).

The spelling of 531450 in words is "five hundred thirty-one thousand, four hundred fifty".