42021333 has 6 divisors (see below), whose sum is σ = 60697494. Its totient is φ = 28014216.

The previous prime is 42021313. The next prime is 42021341. The reversal of 42021333 is 33312024.

42021333 is a `hidden beast` number, since 420 + 213 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24532209 + 17489124 = 4953^2 + 4182^2 .

It is not a de Polignac number, because 42021333 - 2¹⁰ = 42020309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021313) 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 in 5 ways as a sum of consecutive naturals, for example, 2334510 + ... + 2334527.

It is an arithmetic number, because the mean of its divisors is an integer number (10116249).

Almost surely, 2^42021333 is an apocalyptic number.

It is an amenable number.

42021333 is a deficient number, since it is larger than the sum of its proper divisors (18676161).

42021333 is a wasteful number, since it uses less digits than its factorization.

42021333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669043 (or 4669040 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 42021333 is about 6482.3863661463. The cubic root of 42021333 is about 347.6615069688.

Adding to 42021333 its reverse (33312024), we get a palindrome (75333357).

The spelling of 42021333 in words is "forty-two million, twenty-one thousand, three hundred thirty-three".