42857919 has 12 divisors (see below), whose sum is σ = 66668056. Its totient is φ = 26374032.

The previous prime is 42857897. The next prime is 42857921. The reversal of 42857919 is 91975824.

It is not a de Polignac number, because 42857919 - 2¹¹ = 42855871 is a prime.

It is a super-2 number, since 2×42857919² = 3673602442021122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42857959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183037 + ... + 183270.

Almost surely, 2^42857919 is an apocalyptic number.

42857919 is a deficient number, since it is larger than the sum of its proper divisors (23810137).

42857919 is a wasteful number, since it uses less digits than its factorization.

42857919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366326 (or 366323 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 42857919 is about 6546.5959857013. The cubic root of 42857919 is about 349.9535149148.

The spelling of 42857919 in words is "forty-two million, eight hundred fifty-seven thousand, nine hundred nineteen".