1320733 has 4 divisors (see below), whose sum is σ = 1352988. Its totient is φ = 1288480.

The previous prime is 1320731. The next prime is 1320749. The reversal of 1320733 is 3370231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3370231 = 149 ⋅22619.

It can be written as a sum of positive squares in 2 ways, for example, as 636804 + 683929 = 798^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320733 - 2¹ = 1320731 is a prime.

It is a Duffinian number.

1320733 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16066 + ... + 16147.

It is an arithmetic number, because the mean of its divisors is an integer number (338247).

2^1320733 is an apocalyptic number.

It is an amenable number.

1320733 is a deficient number, since it is larger than the sum of its proper divisors (32255).

1320733 is an equidigital number, since it uses as much as digits as its factorization.

1320733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32254.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 1320733 is about 1149.2314823394. The cubic root of 1320733 is about 109.7164321560.

Adding to 1320733 its reverse (3370231), we get a palindrome (4690964).

The spelling of 1320733 in words is "one million, three hundred twenty thousand, seven hundred thirty-three".