42812857 has 2 divisors, whose sum is σ = 42812858. Its totient is φ = 42812856.

The previous prime is 42812839. The next prime is 42812873. The reversal of 42812857 is 75821824.

42812857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33686416 + 9126441 = 5804^2 + 3021^2 .

It is a cyclic number.

It is not a de Polignac number, because 42812857 - 2²³ = 34424249 is a prime.

It is not a weakly prime, because it can be changed into another prime (42812807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21406428 + 21406429.

It is an arithmetic number, because the mean of its divisors is an integer number (21406429).

Almost surely, 2^42812857 is an apocalyptic number.

It is an amenable number.

42812857 is a deficient number, since it is larger than the sum of its proper divisors (1).

42812857 is an equidigital number, since it uses as much as digits as its factorization.

42812857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 37.

The square root of 42812857 is about 6543.1534446320. The cubic root of 42812857 is about 349.8308216393.

The spelling of 42812857 in words is "forty-two million, eight hundred twelve thousand, eight hundred fifty-seven".