531642 has 8 divisors (see below), whose sum is σ = 1063296. Its totient is φ = 177212.

The previous prime is 531637. The next prime is 531667. The reversal of 531642 is 246135.

It is a happy number.

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

531642 is an admirable number.

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, 44298 + ... + 44309.

It is an arithmetic number, because the mean of its divisors is an integer number (132912).

2⁵³¹⁶⁴² is an apocalyptic number.

531642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531642 is a wasteful number, since it uses less digits than its factorization.

531642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88612.

The product of its digits is 720, while the sum is 21.

The square root of 531642 is about 729.1378470495. The cubic root of 531642 is about 81.0102105708.

Adding to 531642 its reverse (246135), we get a palindrome (777777).

The spelling of 531642 in words is "five hundred thirty-one thousand, six hundred forty-two".