1345643 has 4 divisors (see below), whose sum is σ = 1449168. Its totient is φ = 1242120.

The previous prime is 1345633. The next prime is 1345649. The reversal of 1345643 is 3465431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465431 = 457 ⋅7583.

It is a cyclic number.

It is not a de Polignac number, because 1345643 - 2⁴ = 1345627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345649) 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, 51743 + ... + 51768.

It is an arithmetic number, because the mean of its divisors is an integer number (362292).

2^1345643 is an apocalyptic number.

1345643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1345643 is a deficient number, since it is larger than the sum of its proper divisors (103525).

1345643 is a wasteful number, since it uses less digits than its factorization.

1345643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103524.

The product of its digits is 4320, while the sum is 26.

The square root of 1345643 is about 1160.0185343347. The cubic root of 1345643 is about 110.4019181124.

The spelling of 1345643 in words is "one million, three hundred forty-five thousand, six hundred forty-three".