1166543 has 16 divisors (see below), whose sum is σ = 1440000. Its totient is φ = 941976.

The previous prime is 1166533. The next prime is 1166549. The reversal of 1166543 is 3456611.

It is not a de Polignac number, because 1166543 - 2⁴ = 1166527 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166549) 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, 6428 + ... + 6606.

It is an arithmetic number, because the mean of its divisors is an integer number (90000).

2^1166543 is an apocalyptic number.

1166543 is a deficient number, since it is larger than the sum of its proper divisors (273457).

1166543 is an equidigital number, since it uses as much as digits as its factorization.

1166543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1166543 is about 1080.0662016747. The cubic root of 1166543 is about 105.2689401955.

The spelling of 1166543 in words is "one million, one hundred sixty-six thousand, five hundred forty-three".