531065 has 4 divisors (see below), whose sum is σ = 637284. Its totient is φ = 424848.

The previous prime is 531043. The next prime is 531071. The reversal of 531065 is 560135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135424 + 395641 = 368^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 531065 - 2¹⁰ = 530041 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9 and base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53102 + ... + 53111.

It is an arithmetic number, because the mean of its divisors is an integer number (159321).

2⁵³¹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

531065 is a deficient number, since it is larger than the sum of its proper divisors (106219).

531065 is a wasteful number, since it uses less digits than its factorization.

531065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106218.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 531065 is about 728.7420668522. The cubic root of 531065 is about 80.9808927140.

The spelling of 531065 in words is "five hundred thirty-one thousand, sixty-five".