42289133 has 2 divisors, whose sum is σ = 42289134. Its totient is φ = 42289132.

The previous prime is 42289129. The next prime is 42289139. The reversal of 42289133 is 33198224.

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., 28015849 + 14273284 = 5293^2 + 3778^2 .

It is a cyclic number.

It is not a de Polignac number, because 42289133 - 2² = 42289129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42289133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42289139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21144566 + 21144567.

It is an arithmetic number, because the mean of its divisors is an integer number (21144567).

Almost surely, 2^42289133 is an apocalyptic number.

It is an amenable number.

42289133 is a deficient number, since it is larger than the sum of its proper divisors (1).

42289133 is an equidigital number, since it uses as much as digits as its factorization.

42289133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 42289133 is about 6503.0095340542. The cubic root of 42289133 is about 348.3984871347.

Subtracting from 42289133 its reverse (33198224), we obtain a palindrome (9090909).

The spelling of 42289133 in words is "forty-two million, two hundred eighty-nine thousand, one hundred thirty-three".