920321 has 4 divisors (see below), whose sum is σ = 924672. Its totient is φ = 915972.

The previous prime is 920291. The next prime is 920323. The reversal of 920321 is 123029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123029 = 17 ⋅7237.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 920321.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920321.

It is not an unprimeable number, because it can be changed into a prime (920323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841 + ... + 2286.

It is an arithmetic number, because the mean of its divisors is an integer number (231168).

2⁹²⁰³²¹ is an apocalyptic number.

It is an amenable number.

920321 is a deficient number, since it is larger than the sum of its proper divisors (4351).

920321 is a wasteful number, since it uses less digits than its factorization.

920321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 920321 is about 959.3336228862. Note that the first 3 decimals coincide. The cubic root of 920321 is about 97.2701929375.

The spelling of 920321 in words is "nine hundred twenty thousand, three hundred twenty-one".