1166403 has 16 divisors (see below), whose sum is σ = 1806080. Its totient is φ = 655776.

The previous prime is 1166401. The next prime is 1166411. The reversal of 1166403 is 3046611.

It is not a de Polignac number, because 1166403 - 2¹ = 1166401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

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 1166403.

It is not an unprimeable number, because it can be changed into a prime (1166401) 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, 993 + ... + 1821.

It is an arithmetic number, because the mean of its divisors is an integer number (112880).

2^1166403 is an apocalyptic number.

1166403 is a deficient number, since it is larger than the sum of its proper divisors (639677).

1166403 is an equidigital number, since it uses as much as digits as its factorization.

1166403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1166403 is about 1080.0013888880. The cubic root of 1166403 is about 105.2647288230.

The spelling of 1166403 in words is "one million, one hundred sixty-six thousand, four hundred three".