1543343 has 4 divisors (see below), whose sum is σ = 1545840. Its totient is φ = 1540848.

The previous prime is 1543337. The next prime is 1543357. The reversal of 1543343 is 3433451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3433451 = 7 ⋅490493.

It is a cyclic number.

It is not a de Polignac number, because 1543343 - 2⁶ = 1543279 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543393) 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, 446 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (386460).

2^1543343 is an apocalyptic number.

1543343 is a deficient number, since it is larger than the sum of its proper divisors (2497).

1543343 is a wasteful number, since it uses less digits than its factorization.

1543343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496.

The product of its digits is 2160, while the sum is 23.

The square root of 1543343 is about 1242.3135675022. The cubic root of 1543343 is about 115.5635351916.

Adding to 1543343 its reverse (3433451), we get a palindrome (4976794).

The spelling of 1543343 in words is "one million, five hundred forty-three thousand, three hundred forty-three".