42485557 has 2 divisors, whose sum is σ = 42485558. Its totient is φ = 42485556.

The previous prime is 42485537. The next prime is 42485561. The reversal of 42485557 is 75558424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42432196 + 53361 = 6514^2 + 231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42485557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42485537) 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, 21242778 + 21242779.

It is an arithmetic number, because the mean of its divisors is an integer number (21242779).

Almost surely, 2^42485557 is an apocalyptic number.

It is an amenable number.

42485557 is a deficient number, since it is larger than the sum of its proper divisors (1).

42485557 is an equidigital number, since it uses as much as digits as its factorization.

42485557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224000, while the sum is 40.

The square root of 42485557 is about 6518.0945835420. The cubic root of 42485557 is about 348.9370663444.

The spelling of 42485557 in words is "forty-two million, four hundred eighty-five thousand, five hundred fifty-seven".