531239 has 2 divisors, whose sum is σ = 531240. Its totient is φ = 531238.

The previous prime is 531229. The next prime is 531253. The reversal of 531239 is 932135.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531239 - 2⁸ = 530983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265619 + 265620.

It is an arithmetic number, because the mean of its divisors is an integer number (265620).

2⁵³¹²³⁹ is an apocalyptic number.

531239 is a deficient number, since it is larger than the sum of its proper divisors (1).

531239 is an equidigital number, since it uses as much as digits as its factorization.

531239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 23.

The square root of 531239 is about 728.8614408789. The cubic root of 531239 is about 80.9897360362.

The spelling of 531239 in words is "five hundred thirty-one thousand, two hundred thirty-nine".