42485689 has 2 divisors, whose sum is σ = 42485690. Its totient is φ = 42485688.

The previous prime is 42485687. The next prime is 42485719. The reversal of 42485689 is 98658424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42471289 + 14400 = 6517^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 42485689 - 2¹ = 42485687 is a prime.

Together with 42485687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42485687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21242844 + 21242845.

It is an arithmetic number, because the mean of its divisors is an integer number (21242845).

Almost surely, 2^42485689 is an apocalyptic number.

It is an amenable number.

42485689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42485689 is an equidigital number, since it uses as much as digits as its factorization.

42485689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The square root of 42485689 is about 6518.1047091927. The cubic root of 42485689 is about 348.9374277194.

The spelling of 42485689 in words is "forty-two million, four hundred eighty-five thousand, six hundred eighty-nine".