1133643 has 16 divisors (see below), whose sum is σ = 1775360. Its totient is φ = 629856.

The previous prime is 1133641. The next prime is 1133651. The reversal of 1133643 is 3463311.

It is not a de Polignac number, because 1133643 - 2¹ = 1133641 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133641) 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, 48 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (110960).

2^1133643 is an apocalyptic number.

1133643 is a deficient number, since it is larger than the sum of its proper divisors (641717).

1133643 is a wasteful number, since it uses less digits than its factorization.

1133643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its digits is 648, while the sum is 21.

The square root of 1133643 is about 1064.7267255028. The cubic root of 1133643 is about 104.2698551512.

Adding to 1133643 its reverse (3463311), we get a palindrome (4596954).

It can be divided in two parts, 11 and 33643, that multiplied together give a palindrome (370073).

The spelling of 1133643 in words is "one million, one hundred thirty-three thousand, six hundred forty-three".