1142321 has 2 divisors, whose sum is σ = 1142322.
Its totient is φ = 1142320.
The previous prime is 1142311. The next prime is 1142333. The reversal of 1142321 is 1232411.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 600625 + 541696 = 775^2 + 736^2
It is an emirp because it is prime and its reverse (1232411) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1142321 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 1142296 and 1142305.
It is not a weakly prime, because it can be changed into another prime (1142311) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571160 + 571161.
It is an arithmetic number, because the mean of its divisors is an integer number (571161).
21142321 is an apocalyptic number.
It is an amenable number.
1142321 is a deficient number, since it is larger than the sum of its proper divisors (1).
1142321 is an equidigital number, since it uses as much as digits as its factorization.
1142321 is an evil number, because the sum of its binary digits is even.
The product of its digits is 48, while the sum is 14.
The square root of 1142321 is about 1068.7941803734.
The cubic root of 1142321 is about 104.5352399025.
Adding to 1142321 its reverse (1232411), we get a palindrome (2374732).
The spelling of 1142321 in words is "one million, one hundred forty-two thousand, three hundred twenty-one".