1042321 has 16 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 794880.

The previous prime is 1042309. The next prime is 1042331. The reversal of 1042321 is 1232401.

It is a cyclic number.

It is not a de Polignac number, because 1042321 - 2⁷ = 1042193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1042331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2031 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2^1042321 is an apocalyptic number.

1042321 is the 646-th heptagonal number.

It is an amenable number.

1042321 is a deficient number, since it is larger than the sum of its proper divisors (288239).

1042321 is a wasteful number, since it uses less digits than its factorization.

1042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1042321 is about 1020.9412323929. The cubic root of 1042321 is about 101.3912543501.

Adding to 1042321 its reverse (1232401), we get a palindrome (2274722).

The spelling of 1042321 in words is "one million, forty-two thousand, three hundred twenty-one".