1321423 has 4 divisors (see below), whose sum is σ = 1343880. Its totient is φ = 1298968.

The previous prime is 1321421. The next prime is 1321429. The reversal of 1321423 is 3241231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3241231 = 7 ⋅463033.

It is a cyclic number.

It is not a de Polignac number, because 1321423 - 2¹ = 1321421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321397 and 1321406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421) 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, 11140 + ... + 11257.

It is an arithmetic number, because the mean of its divisors is an integer number (335970).

2^1321423 is an apocalyptic number.

1321423 is a deficient number, since it is larger than the sum of its proper divisors (22457).

1321423 is an equidigital number, since it uses as much as digits as its factorization.

1321423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22456.

The product of its digits is 144, while the sum is 16.

The square root of 1321423 is about 1149.5316437576. The cubic root of 1321423 is about 109.7355354768.

Adding to 1321423 its reverse (3241231), we get a palindrome (4562654).

The spelling of 1321423 in words is "one million, three hundred twenty-one thousand, four hundred twenty-three".