42303421 has 2 divisors, whose sum is σ = 42303422. Its totient is φ = 42303420.

The previous prime is 42303407. The next prime is 42303449. The reversal of 42303421 is 12430324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42068196 + 235225 = 6486^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 42303421 - 2⁵ = 42303389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42303451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21151710 + 21151711.

It is an arithmetic number, because the mean of its divisors is an integer number (21151711).

Almost surely, 2^42303421 is an apocalyptic number.

It is an amenable number.

42303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42303421 is an equidigital number, since it uses as much as digits as its factorization.

42303421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 42303421 is about 6504.1080095583. The cubic root of 42303421 is about 348.4377198856.

Adding to 42303421 its reverse (12430324), we get a palindrome (54733745).

It can be divided in two parts, 42303 and 421, that added together give a palindrome (42724).

The spelling of 42303421 in words is "forty-two million, three hundred three thousand, four hundred twenty-one".