1331380 has 12 divisors (see below), whose sum is σ = 2795940. Its totient is φ = 532544.

The previous prime is 1331377. The next prime is 1331381. The reversal of 1331380 is 831331.

It can be written as a sum of positive squares in 2 ways, for example, as 224676 + 1106704 = 474^2 + 1052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331381) 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, 33265 + ... + 33304.

It is an arithmetic number, because the mean of its divisors is an integer number (232995).

2^1331380 is an apocalyptic number.

1331380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331380 is an abundant number, since it is smaller than the sum of its proper divisors (1464560).

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

1331380 is a wasteful number, since it uses less digits than its factorization.

1331380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66578 (or 66576 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1331380 is about 1153.8544102269. The cubic root of 1331380 is about 110.0104673235.

It can be divided in two parts, 1331 and 380, that added together give a triangular number (1711 = T₅₈).

The spelling of 1331380 in words is "one million, three hundred thirty-one thousand, three hundred eighty".