2340421 has 2 divisors, whose sum is σ = 2340422. Its totient is φ = 2340420.

The previous prime is 2340419. The next prime is 2340431. The reversal of 2340421 is 1240432.

2340421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 408321 = 1390^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340421 - 2¹ = 2340419 is a prime.

Together with 2340419, it forms a pair of twin primes.

It is an Ulam number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2340395 and 2340404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170210 + 1170211.

It is an arithmetic number, because the mean of its divisors is an integer number (1170211).

2^2340421 is an apocalyptic number.

It is an amenable number.

2340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340421 is an equidigital number, since it uses as much as digits as its factorization.

2340421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2340421 is about 1529.8434560438. The cubic root of 2340421 is about 132.7694008527.

Adding to 2340421 its reverse (1240432), we get a palindrome (3580853).

The spelling of 2340421 in words is "two million, three hundred forty thousand, four hundred twenty-one".