42742857 has 8 divisors (see below), whose sum is σ = 58065984. Its totient is φ = 27957488.

The previous prime is 42742853. The next prime is 42742859. The reversal of 42742857 is 75824724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42742857 - 2² = 42742853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42742853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134253 + ... + 134570.

It is an arithmetic number, because the mean of its divisors is an integer number (7258248).

Almost surely, 2^42742857 is an apocalyptic number.

It is an amenable number.

42742857 is a deficient number, since it is larger than the sum of its proper divisors (15323127).

42742857 is a wasteful number, since it uses less digits than its factorization.

42742857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268879.

The product of its digits is 125440, while the sum is 39.

The square root of 42742857 is about 6537.8021536293. The cubic root of 42742857 is about 349.6400571697.

The spelling of 42742857 in words is "forty-two million, seven hundred forty-two thousand, eight hundred fifty-seven".