1331392 has 28 divisors (see below), whose sum is σ = 2688336. Its totient is φ = 654080.

The previous prime is 1331383. The next prime is 1331399. The reversal of 1331392 is 2931331.

It is not an unprimeable number, because it can be changed into a prime (1331399) 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, 4398 + ... + 4690.

It is an arithmetic number, because the mean of its divisors is an integer number (96012).

2^1331392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344168).

1331392 is an abundant number, since it is smaller than the sum of its proper divisors (1356944).

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

1331392 is an equidigital number, since it uses as much as digits as its factorization.

1331392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 366 counting only the distinct ones).

The product of its digits is 486, while the sum is 22.

The square root of 1331392 is about 1153.8596101779. The cubic root of 1331392 is about 110.0107978381.

It can be divided in two parts, 133 and 1392, that multiplied together give a triangular number (185136 = T₆₀₈).

The spelling of 1331392 in words is "one million, three hundred thirty-one thousand, three hundred ninety-two".