42645233 has 4 divisors (see below), whose sum is σ = 42661860. Its totient is φ = 42628608.

The previous prime is 42645221. The next prime is 42645241. The reversal of 42645233 is 33254624.

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 40551424 + 2093809 = 6368^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 42645233 - 2⁴ = 42645217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42645196 and 42645205.

It is not an unprimeable number, because it can be changed into a prime (42645263) 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, 3560 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (10665465).

Almost surely, 2^42645233 is an apocalyptic number.

It is an amenable number.

42645233 is a deficient number, since it is larger than the sum of its proper divisors (16627).

42645233 is a wasteful number, since it uses less digits than its factorization.

42645233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626.

The product of its digits is 17280, while the sum is 29.

The square root of 42645233 is about 6530.3317679885. The cubic root of 42645233 is about 349.3736634923.

Adding to 42645233 its reverse (33254624), we get a palindrome (75899857).

The spelling of 42645233 in words is "forty-two million, six hundred forty-five thousand, two hundred thirty-three".