421340033 has 4 divisors (see below), whose sum is σ = 422027988. Its totient is φ = 420652080.

The previous prime is 421340021. The next prime is 421340039. The reversal of 421340033 is 330043124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 217621504 + 203718529 = 14752^2 + 14273^2 .

It is a cyclic number.

It is not a de Polignac number, because 421340033 - 2⁶ = 421339969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421339987 and 421340014.

It is not an unprimeable number, because it can be changed into a prime (421340039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343058 + ... + 344283.

It is an arithmetic number, because the mean of its divisors is an integer number (105506997).

Almost surely, 2^421340033 is an apocalyptic number.

It is an amenable number.

421340033 is a deficient number, since it is larger than the sum of its proper divisors (687955).

421340033 is an equidigital number, since it uses as much as digits as its factorization.

421340033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687954.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 421340033 is about 20526.5689534320. The cubic root of 421340033 is about 749.6828484239.

Adding to 421340033 its reverse (330043124), we get a palindrome (751383157).

The spelling of 421340033 in words is "four hundred twenty-one million, three hundred forty thousand, thirty-three".