1331238 has 8 divisors (see below), whose sum is σ = 2662488. Its totient is φ = 443744.

The previous prime is 1331227. The next prime is 1331243. The reversal of 1331238 is 8321331.

It is a happy number.

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

1331238 is an admirable number.

It is a super-2 number, since 2×1331238² = 3544389225288, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 110931 + ... + 110942.

It is an arithmetic number, because the mean of its divisors is an integer number (332811).

2^1331238 is an apocalyptic number.

1331238 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.

1331238 is a wasteful number, since it uses less digits than its factorization.

1331238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221878.

The product of its digits is 432, while the sum is 21.

The square root of 1331238 is about 1153.7928756930. The cubic root of 1331238 is about 110.0065560831.

Adding to 1331238 its reverse (8321331), we get a palindrome (9652569).

The spelling of 1331238 in words is "one million, three hundred thirty-one thousand, two hundred thirty-eight".