531442 has 8 divisors (see below), whose sum is σ = 816732. Its totient is φ = 259200.

The previous prime is 531383. The next prime is 531457. The reversal of 531442 is 244135.

531442 is nontrivially palindromic in base 3 and base 9.

531442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3¹²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 1 = 729^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in 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, 3159 + ... + 3322.

531442 is a Friedman number, since it can be written as 5-4+((2+1)^3)^4, using all its digits and the basic arithmetic operations.

2⁵³¹⁴⁴² is an apocalyptic number.

531442 is a deficient number, since it is larger than the sum of its proper divisors (285290).

531442 is a wasteful number, since it uses less digits than its factorization.

531442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524.

The product of its digits is 480, while the sum is 19.

The square root of 531442 is about 729.0006858707. Note that the first 3 decimals coincide. The cubic root of 531442 is about 81.0000508052. Note that the first 4 decimals are identical.

Adding to 531442 its reverse (244135), we get a palindrome (775577).

It can be divided in two parts, 5314 and 42, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 531442 in words is "five hundred thirty-one thousand, four hundred forty-two".