42423133 has 2 divisors, whose sum is σ = 42423134. Its totient is φ = 42423132.

The previous prime is 42423119. The next prime is 42423149. The reversal of 42423133 is 33132424.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28270489 + 14152644 = 5317^2 + 3762^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423133 - 2²⁵ = 8868701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42423113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211566 + 21211567.

It is an arithmetic number, because the mean of its divisors is an integer number (21211567).

Almost surely, 2^42423133 is an apocalyptic number.

It is an amenable number.

42423133 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423133 is an equidigital number, since it uses as much as digits as its factorization.

42423133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 22.

The square root of 42423133 is about 6513.3043073389. The cubic root of 42423133 is about 348.7660849114.

Adding to 42423133 its reverse (33132424), we get a palindrome (75555557).

The spelling of 42423133 in words is "forty-two million, four hundred twenty-three thousand, one hundred thirty-three".