531125 has 16 divisors (see below), whose sum is σ = 758784. Its totient is φ = 363600.

The previous prime is 531121. The next prime is 531133. The reversal of 531125 is 521135.

It is not a de Polignac number, because 531125 - 2² = 531121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (47424).

2⁵³¹¹²⁵ is an apocalyptic number.

It is an amenable number.

531125 is a deficient number, since it is larger than the sum of its proper divisors (227659).

531125 is an equidigital number, since it uses as much as digits as its factorization.

531125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 619 counting only the distinct ones).

The product of its digits is 150, while the sum is 17.

The square root of 531125 is about 728.7832325184. The cubic root of 531125 is about 80.9839423537.

Multiplying 531125 by its sum of digits (17), we get a triangular number (9029125 = T₄₂₄₉).

It can be divided in two parts, 531 and 125, that added together give a palindrome (656).

The spelling of 531125 in words is "five hundred thirty-one thousand, one hundred twenty-five".