1340345 has 4 divisors (see below), whose sum is σ = 1608420. Its totient is φ = 1072272.

The previous prime is 1340333. The next prime is 1340357. The reversal of 1340345 is 5430431.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1340333) and next prime (1340357).

It can be written as a sum of positive squares in 2 ways, for example, as 913936 + 426409 = 956^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340345 - 2⁴ = 1340329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134030 + ... + 134039.

It is an arithmetic number, because the mean of its divisors is an integer number (402105).

2^1340345 is an apocalyptic number.

It is an amenable number.

1340345 is a deficient number, since it is larger than the sum of its proper divisors (268075).

1340345 is an equidigital number, since it uses as much as digits as its factorization.

1340345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268074.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1340345 is about 1157.7326979921. The cubic root of 1340345 is about 110.2568378617.

Adding to 1340345 its reverse (5430431), we get a palindrome (6770776).

The spelling of 1340345 in words is "one million, three hundred forty thousand, three hundred forty-five".