531601 has 12 divisors (see below), whose sum is σ = 652080. Its totient is φ = 430920.

The previous prime is 531589. The next prime is 531611. The reversal of 531601 is 106135.

It is not a de Polignac number, because 531601 - 2⁵ = 531569 is a prime.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (531611) 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 11 ways as a sum of consecutive naturals, for example, 646 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (54340).

2⁵³¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

531601 is a deficient number, since it is larger than the sum of its proper divisors (120479).

531601 is a wasteful number, since it uses less digits than its factorization.

531601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 531601 is about 729.1097311105. The cubic root of 531601 is about 81.0081280265.

Adding to 531601 its reverse (106135), we get a palindrome (637736).

The spelling of 531601 in words is "five hundred thirty-one thousand, six hundred one".