42333021 has 12 divisors (see below), whose sum is σ = 61274460. Its totient is φ = 28163520.

The previous prime is 42333017. The next prime is 42333029. The reversal of 42333021 is 12033324.

It can be written as a sum of positive squares in 2 ways, for example, as 39200121 + 3132900 = 6261^2 + 1770^2 .

It is not a de Polignac number, because 42333021 - 2² = 42333017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42332985 and 42333003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42333029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40 + ... + 9201.

It is an arithmetic number, because the mean of its divisors is an integer number (5106205).

Almost surely, 2^42333021 is an apocalyptic number.

It is an amenable number.

42333021 is a deficient number, since it is larger than the sum of its proper divisors (18941439).

42333021 is a wasteful number, since it uses less digits than its factorization.

42333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756 (or 9753 counting only the distinct ones).

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

The square root of 42333021 is about 6506.3830966213. The cubic root of 42333021 is about 348.5189690428.

Adding to 42333021 its reverse (12033324), we get a palindrome (54366345).

The spelling of 42333021 in words is "forty-two million, three hundred thirty-three thousand, twenty-one".