2430021 has 8 divisors (see below), whose sum is σ = 3534624. Its totient is φ = 1472720.

The previous prime is 2430013. The next prime is 2430047. The reversal of 2430021 is 1200342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2430021 - 2³ = 2430013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2429979 and 2430006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2430011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36786 + ... + 36851.

It is an arithmetic number, because the mean of its divisors is an integer number (441828).

2^2430021 is an apocalyptic number.

It is an amenable number.

2430021 is a deficient number, since it is larger than the sum of its proper divisors (1104603).

2430021 is a wasteful number, since it uses less digits than its factorization.

2430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73651.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2430021 is about 1558.8524625506. The cubic root of 2430021 is about 134.4425296775.

Adding to 2430021 its reverse (1200342), we get a palindrome (3630363).

The spelling of 2430021 in words is "two million, four hundred thirty thousand, twenty-one".