1331232 has 72 divisors (see below), whose sum is σ = 4079376. Its totient is φ = 379008.

The previous prime is 1331227. The next prime is 1331243. The reversal of 1331232 is 2321331.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4563 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (56658).

2^1331232 is an apocalyptic number.

1331232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039688).

1331232 is an abundant number, since it is smaller than the sum of its proper divisors (2748144).

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

1331232 is a wasteful number, since it uses less digits than its factorization.

1331232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 295 counting only the distinct ones).

The product of its digits is 108, while the sum is 15.

The square root of 1331232 is about 1153.7902755700. The cubic root of 1331232 is about 110.0063908133.

Adding to 1331232 its reverse (2321331), we get a palindrome (3652563).

Subtracting 1331232 from its reverse (2321331), we obtain a palindrome (990099).

The spelling of 1331232 in words is "one million, three hundred thirty-one thousand, two hundred thirty-two".