1340443 has 8 divisors (see below), whose sum is σ = 1459808. Its totient is φ = 1223424.

The previous prime is 1340441. The next prime is 1340447. The reversal of 1340443 is 3440431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340443 - 2¹ = 1340441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340443.

It is not an unprimeable number, because it can be changed into a prime (1340441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (182476).

2^1340443 is an apocalyptic number.

1340443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1340443 is a deficient number, since it is larger than the sum of its proper divisors (119365).

1340443 is a wasteful number, since it uses less digits than its factorization.

1340443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1340443 is about 1157.7750213232. The cubic root of 1340443 is about 110.2595249577.

Adding to 1340443 its reverse (3440431), we get a palindrome (4780874).

The spelling of 1340443 in words is "one million, three hundred forty thousand, four hundred forty-three".