4030421 has 2 divisors, whose sum is σ = 4030422. Its totient is φ = 4030420.

The previous prime is 4030417. The next prime is 4030441. The reversal of 4030421 is 1240304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 184900 = 1961^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 4030421 - 2² = 4030417 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 4030396 and 4030405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4030441) 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, 2015210 + 2015211.

It is an arithmetic number, because the mean of its divisors is an integer number (2015211).

Almost surely, 2^4030421 is an apocalyptic number.

It is an amenable number.

4030421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4030421 is an equidigital number, since it uses as much as digits as its factorization.

4030421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4030421 is about 2007.5908447689. The cubic root of 4030421 is about 159.1415087137.

Adding to 4030421 its reverse (1240304), we get a palindrome (5270725).

The spelling of 4030421 in words is "four million, thirty thousand, four hundred twenty-one".