42885457 has 2 divisors, whose sum is σ = 42885458. Its totient is φ = 42885456.

The previous prime is 42885449. The next prime is 42885473. The reversal of 42885457 is 75458824.

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., 41357761 + 1527696 = 6431^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 42885457 - 2³ = 42885449 is a prime.

It is not a weakly prime, because it can be changed into another prime (42885497) 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, 21442728 + 21442729.

It is an arithmetic number, because the mean of its divisors is an integer number (21442729).

Almost surely, 2^42885457 is an apocalyptic number.

It is an amenable number.

42885457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42885457 is an equidigital number, since it uses as much as digits as its factorization.

42885457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 358400, while the sum is 43.

The square root of 42885457 is about 6548.6988784033. The cubic root of 42885457 is about 350.0284521088.

The spelling of 42885457 in words is "forty-two million, eight hundred eighty-five thousand, four hundred fifty-seven".