2305021 has 4 divisors (see below), whose sum is σ = 2354112. Its totient is φ = 2255932.

The previous prime is 2305003. The next prime is 2305027. The reversal of 2305021 is 1205032.

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 2305021 - 2⁷ = 2304893 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 2304992 and 2305010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2305027) 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, 24475 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (588528).

2^2305021 is an apocalyptic number.

It is an amenable number.

2305021 is a deficient number, since it is larger than the sum of its proper divisors (49091).

2305021 is an equidigital number, since it uses as much as digits as its factorization.

2305021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49090.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 2305021 is about 1518.2295610348. The cubic root of 2305021 is about 132.0965967258.

The spelling of 2305021 in words is "two million, three hundred five thousand, twenty-one".