331242 has 8 divisors (see below), whose sum is σ = 662496. Its totient is φ = 110412.

The previous prime is 331241. The next prime is 331249. The reversal of 331242 is 242133.

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

331242 is an admirable number.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331242.

It is not an unprimeable number, because it can be changed into a prime (331241) 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, 27598 + ... + 27609.

It is an arithmetic number, because the mean of its divisors is an integer number (82812).

2³³¹²⁴² is an apocalyptic number.

331242 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.

331242 is a wasteful number, since it uses less digits than its factorization.

331242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55212.

The product of its digits is 144, while the sum is 15.

The square root of 331242 is about 575.5362716632. The cubic root of 331242 is about 69.1908181654.

Adding to 331242 its reverse (242133), we get a palindrome (573375).

It can be divided in two parts, 33 and 1242, that added together give a triangular number (1275 = T₅₀).

The spelling of 331242 in words is "three hundred thirty-one thousand, two hundred forty-two".