531842 has 4 divisors (see below), whose sum is σ = 797766.
Its totient is φ = 265920.
The previous prime is 531841. The next prime is 531847. The reversal of 531842 is 248135.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248135 = 5 ⋅49627.
It can be written as a sum of positive squares in only one way, i.e., 474721 + 57121 = 689^2 + 239^2
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531842.
It is not an unprimeable number, because it can be changed into a prime (531841) 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 as a sum of consecutive naturals, namely, 132959 + ... + 132962.
2531842 is an apocalyptic number.
531842 is a deficient number, since it is larger than the sum of its proper divisors (265924).
531842 is a wasteful number, since it uses less digits than its factorization.
531842 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 265923.
The product of its digits is 960, while the sum is 23.
The square root of 531842 is about 729.2749824312.
The cubic root of 531842 is about 81.0203677886.
Adding to 531842 its reverse (248135), we get a palindrome (779977).
The spelling of 531842 in words is "five hundred thirty-one thousand, eight hundred forty-two".