42442733 has 2 divisors, whose sum is σ = 42442734. Its totient is φ = 42442732.

The previous prime is 42442723. The next prime is 42442769. The reversal of 42442733 is 33724424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42016324 + 426409 = 6482^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 42442733 - 2⁴ = 42442717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42442696 and 42442705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42442723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221366 + 21221367.

It is an arithmetic number, because the mean of its divisors is an integer number (21221367).

Almost surely, 2^42442733 is an apocalyptic number.

It is an amenable number.

42442733 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442733 is an equidigital number, since it uses as much as digits as its factorization.

42442733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 29.

The square root of 42442733 is about 6514.8087462335. The cubic root of 42442733 is about 348.8197880234.

The spelling of 42442733 in words is "forty-two million, four hundred forty-two thousand, seven hundred thirty-three".