1331288 has 16 divisors (see below), whose sum is σ = 2852880. Its totient is φ = 570528.

The previous prime is 1331279. The next prime is 1331293. The reversal of 1331288 is 8821331.

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, 11831 + ... + 11942.

It is an arithmetic number, because the mean of its divisors is an integer number (178305).

2^1331288 is an apocalyptic number.

It is an amenable number.

1331288 is an abundant number, since it is smaller than the sum of its proper divisors (1521592).

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

1331288 is a wasteful number, since it uses less digits than its factorization.

1331288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23786 (or 23782 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 1331288 is about 1153.8145431567. The cubic root of 1331288 is about 110.0079333121.

It can be divided in two parts, 133128 and 8, that multiplied together give a square (1065024 = 1032²).

The spelling of 1331288 in words is "one million, three hundred thirty-one thousand, two hundred eighty-eight".