2300721 has 4 divisors (see below), whose sum is σ = 3067632. Its totient is φ = 1533812.

The previous prime is 2300719. The next prime is 2300731. The reversal of 2300721 is 1270032.

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 a cyclic number.

It is not a de Polignac number, because 2300721 - 2¹ = 2300719 is a prime.

It is a D-number.

2300721 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2300721.

It is not an unprimeable number, because it can be changed into a prime (2300731) 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, 383451 + ... + 383456.

It is an arithmetic number, because the mean of its divisors is an integer number (766908).

2^2300721 is an apocalyptic number.

It is an amenable number.

2300721 is a deficient number, since it is larger than the sum of its proper divisors (766911).

2300721 is an equidigital number, since it uses as much as digits as its factorization.

2300721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766910.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 2300721 is about 1516.8127768449. The cubic root of 2300721 is about 132.0144038460.

Adding to 2300721 its reverse (1270032), we get a palindrome (3570753).

The spelling of 2300721 in words is "two million, three hundred thousand, seven hundred twenty-one".