1321243 has 8 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 1029480.

The previous prime is 1321219. The next prime is 1321247. The reversal of 1321243 is 3421231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321243 - 2⁹ = 1320731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8503 + ... + 8656.

It is an arithmetic number, because the mean of its divisors is an integer number (205920).

2^1321243 is an apocalyptic number.

1321243 is a deficient number, since it is larger than the sum of its proper divisors (326117).

1321243 is a wasteful number, since it uses less digits than its factorization.

1321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17177.

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

The square root of 1321243 is about 1149.4533483356. The cubic root of 1321243 is about 109.7305526430.

Adding to 1321243 its reverse (3421231), we get a palindrome (4742474).

The spelling of 1321243 in words is "one million, three hundred twenty-one thousand, two hundred forty-three".