1303543 has 4 divisors (see below), whose sum is σ = 1380240. Its totient is φ = 1226848.

The previous prime is 1303541. The next prime is 1303553. The reversal of 1303543 is 3453031.

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

It is a cyclic number.

It is not a de Polignac number, because 1303543 - 2¹ = 1303541 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 1303543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303541) 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, 38323 + ... + 38356.

It is an arithmetic number, because the mean of its divisors is an integer number (345060).

2^1303543 is an apocalyptic number.

1303543 is a deficient number, since it is larger than the sum of its proper divisors (76697).

1303543 is an equidigital number, since it uses as much as digits as its factorization.

1303543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76696.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 1303543 is about 1141.7280762073. The cubic root of 1303543 is about 109.2383472151.

Adding to 1303543 its reverse (3453031), we get a palindrome (4756574).

The spelling of 1303543 in words is "one million, three hundred three thousand, five hundred forty-three".