1023543 has 16 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 675288.

The previous prime is 1023541. The next prime is 1023551. The reversal of 1023543 is 3453201.

It is not a de Polignac number, because 1023543 - 2¹ = 1023541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4396 + ... + 4622.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2^1023543 is an apocalyptic number.

1023543 is a deficient number, since it is larger than the sum of its proper divisors (508617).

1023543 is a wasteful number, since it uses less digits than its factorization.

1023543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1023543 is about 1011.7030196654. The cubic root of 1023543 is about 100.7786873875.

Adding to 1023543 its reverse (3453201), we get a palindrome (4476744).

The spelling of 1023543 in words is "one million, twenty-three thousand, five hundred forty-three".