42520133 has 2 divisors, whose sum is σ = 42520134. Its totient is φ = 42520132.

The previous prime is 42520129. The next prime is 42520139. The reversal of 42520133 is 33102524.

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., 41190724 + 1329409 = 6418^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520133 - 2² = 42520129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520139) 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 as a sum of consecutive naturals, namely, 21260066 + 21260067.

It is an arithmetic number, because the mean of its divisors is an integer number (21260067).

Almost surely, 2^42520133 is an apocalyptic number.

It is an amenable number.

42520133 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520133 is an equidigital number, since it uses as much as digits as its factorization.

42520133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42520133 is about 6520.7463529875. The cubic root of 42520133 is about 349.0316991046.

Adding to 42520133 its reverse (33102524), we get a palindrome (75622657).

The spelling of 42520133 in words is "forty-two million, five hundred twenty thousand, one hundred thirty-three".