42885473 has 2 divisors, whose sum is σ = 42885474. Its totient is φ = 42885472.

The previous prime is 42885457. The next prime is 42885481. The reversal of 42885473 is 37458824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37540129 + 5345344 = 6127^2 + 2312^2 .

It is a cyclic number.

It is not a de Polignac number, because 42885473 - 2⁴ = 42885457 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 42885473.

It is not a weakly prime, because it can be changed into another prime (42885173) 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, 21442736 + 21442737.

It is an arithmetic number, because the mean of its divisors is an integer number (21442737).

Almost surely, 2^42885473 is an apocalyptic number.

It is an amenable number.

42885473 is a deficient number, since it is larger than the sum of its proper divisors (1).

42885473 is an equidigital number, since it uses as much as digits as its factorization.

42885473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 41.

The square root of 42885473 is about 6548.7001000199. The cubic root of 42885473 is about 350.0284956391.

The spelling of 42885473 in words is "forty-two million, eight hundred eighty-five thousand, four hundred seventy-three".