531129 has 4 divisors (see below), whose sum is σ = 708176. Its totient is φ = 354084.

The previous prime is 531121. The next prime is 531133. The reversal of 531129 is 921135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 531129 - 2³ = 531121 is a prime.

It is a D-number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 88519 + ... + 88524.

It is an arithmetic number, because the mean of its divisors is an integer number (177044).

531129 is a Friedman number, since it can be written as 9^(5+1)-312, using all its digits and the basic arithmetic operations.

2⁵³¹¹²⁹ is an apocalyptic number.

It is an amenable number.

531129 is a deficient number, since it is larger than the sum of its proper divisors (177047).

531129 is a wasteful number, since it uses less digits than its factorization.

531129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177046.

The product of its digits is 270, while the sum is 21.

The square root of 531129 is about 728.7859768135. The cubic root of 531129 is about 80.9841456548.

The spelling of 531129 in words is "five hundred thirty-one thousand, one hundred twenty-nine".