1321703 has 4 divisors (see below), whose sum is σ = 1330608. Its totient is φ = 1312800.

The previous prime is 1321693. The next prime is 1321711. The reversal of 1321703 is 3071231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321703 - 2⁸ = 1321447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4226 + ... + 4527.

It is an arithmetic number, because the mean of its divisors is an integer number (332652).

2^1321703 is an apocalyptic number.

1321703 is a deficient number, since it is larger than the sum of its proper divisors (8905).

1321703 is an equidigital number, since it uses as much as digits as its factorization.

1321703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1321703 is about 1149.6534260376. The cubic root of 1321703 is about 109.7432856522.

Adding to 1321703 its reverse (3071231), we get a palindrome (4392934).

The spelling of 1321703 in words is "one million, three hundred twenty-one thousand, seven hundred three".