42745133 has 4 divisors (see below), whose sum is σ = 42798780. Its totient is φ = 42691488.

The previous prime is 42745111. The next prime is 42745151. The reversal of 42745133 is 33154724.

It is a happy number.

42745133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 14845609 + 27899524 = 3853^2 + 5282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42745133 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 = 42745096 and 42745105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42745163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25610 + ... + 27227.

It is an arithmetic number, because the mean of its divisors is an integer number (10699695).

Almost surely, 2^42745133 is an apocalyptic number.

It is an amenable number.

42745133 is a deficient number, since it is larger than the sum of its proper divisors (53647).

42745133 is an equidigital number, since it uses as much as digits as its factorization.

42745133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53646.

The product of its digits is 10080, while the sum is 29.

The square root of 42745133 is about 6537.9762159249. The cubic root of 42745133 is about 349.6462630147.

Adding to 42745133 its reverse (33154724), we get a palindrome (75899857).

The spelling of 42745133 in words is "forty-two million, seven hundred forty-five thousand, one hundred thirty-three".