2443421 has 2 divisors, whose sum is σ = 2443422. Its totient is φ = 2443420.

The previous prime is 2443409. The next prime is 2443429. The reversal of 2443421 is 1243442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2208196 + 235225 = 1486^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2443421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2443393 and 2443402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2443429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1221710 + 1221711.

It is an arithmetic number, because the mean of its divisors is an integer number (1221711).

2^2443421 is an apocalyptic number.

It is an amenable number.

2443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2443421 is an equidigital number, since it uses as much as digits as its factorization.

2443421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 20.

The square root of 2443421 is about 1563.1445870424. The cubic root of 2443421 is about 134.6891981328.

Adding to 2443421 its reverse (1243442), we get a palindrome (3686863).

The spelling of 2443421 in words is "two million, four hundred forty-three thousand, four hundred twenty-one".