1340347 has 4 divisors (see below), whose sum is σ = 1383616. Its totient is φ = 1297080.

The previous prime is 1340333. The next prime is 1340357. The reversal of 1340347 is 7430431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7430431 = 797 ⋅9323.

It is a cyclic number.

It is not a de Polignac number, because 1340347 - 2¹¹ = 1338299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21588 + ... + 21649.

It is an arithmetic number, because the mean of its divisors is an integer number (345904).

2^1340347 is an apocalyptic number.

1340347 is a deficient number, since it is larger than the sum of its proper divisors (43269).

1340347 is an equidigital number, since it uses as much as digits as its factorization.

1340347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43268.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 1340347 is about 1157.7335617490. The cubic root of 1340347 is about 110.2568927017.

Adding to 1340347 its reverse (7430431), we get a palindrome (8770778).

The spelling of 1340347 in words is "one million, three hundred forty thousand, three hundred forty-seven".