42545857 has 8 divisors (see below), whose sum is σ = 44854272. Its totient is φ = 40296000.

The previous prime is 42545851. The next prime is 42545873. The reversal of 42545857 is 75854524.

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 42545857 - 2⁷ = 42545729 is a prime.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (42545851) 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, 13144 + ... + 16057.

It is an arithmetic number, because the mean of its divisors is an integer number (5606784).

Almost surely, 2^42545857 is an apocalyptic number.

42545857 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42545857 is a deficient number, since it is larger than the sum of its proper divisors (2308415).

42545857 is a wasteful number, since it uses less digits than its factorization.

42545857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29279.

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

The square root of 42545857 is about 6522.7185283438. The cubic root of 42545857 is about 349.1020711126.

The spelling of 42545857 in words is "forty-two million, five hundred forty-five thousand, eight hundred fifty-seven".