4233420421 has 8 divisors (see below), whose sum is σ = 4330093464. Its totient is φ = 4137369600.

The previous prime is 4233420397. The next prime is 4233420431. The reversal of 4233420421 is 1240243324.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2436508321 + 1796912100 = 49361^2 + 42390^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4233420421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4233420431) 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, 141780 + ... + 169021.

It is an arithmetic number, because the mean of its divisors is an integer number (541261683).

Almost surely, 2^4233420421 is an apocalyptic number.

It is an amenable number.

4233420421 is a deficient number, since it is larger than the sum of its proper divisors (96673043).

4233420421 is a wasteful number, since it uses less digits than its factorization.

4233420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311111.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4233420421 is about 65064.7402284832. The cubic root of 4233420421 is about 1617.6968262990.

Adding to 4233420421 its reverse (1240243324), we get a palindrome (5473663745).

The spelling of 4233420421 in words is "four billion, two hundred thirty-three million, four hundred twenty thousand, four hundred twenty-one".