2320921 has 4 divisors (see below), whose sum is σ = 2325712. Its totient is φ = 2316132.

The previous prime is 2320909. The next prime is 2320933. The reversal of 2320921 is 1290232.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (2320909) and next prime (2320933).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2320921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2320961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1575 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (581428).

2^2320921 is an apocalyptic number.

It is an amenable number.

2320921 is a deficient number, since it is larger than the sum of its proper divisors (4791).

2320921 is an equidigital number, since it uses as much as digits as its factorization.

2320921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2320921 is about 1523.4569242351. The cubic root of 2320921 is about 132.3996344492.

The spelling of 2320921 in words is "two million, three hundred twenty thousand, nine hundred twenty-one".