1381340 has 12 divisors (see below), whose sum is σ = 2900856. Its totient is φ = 552528.

The previous prime is 1381337. The next prime is 1381349. The reversal of 1381340 is 431831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 69067 = 1381340 / (1 + 3 + 8 + 1 + 3 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34514 + ... + 34553.

It is an arithmetic number, because the mean of its divisors is an integer number (241738).

2^1381340 is an apocalyptic number.

1381340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381340 is an abundant number, since it is smaller than the sum of its proper divisors (1519516).

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

1381340 is a wasteful number, since it uses less digits than its factorization.

1381340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69076 (or 69074 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1381340 is about 1175.3042159373. The cubic root of 1381340 is about 111.3696520169.

The spelling of 1381340 in words is "one million, three hundred eighty-one thousand, three hundred forty".