42757217 has 4 divisors (see below), whose sum is σ = 43094016. Its totient is φ = 42420420.

The previous prime is 42757199. The next prime is 42757229. The reversal of 42757217 is 71275724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42757217 - 2¹⁴ = 42740833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42757417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168209 + ... + 168462.

It is an arithmetic number, because the mean of its divisors is an integer number (10773504).

Almost surely, 2^42757217 is an apocalyptic number.

It is an amenable number.

42757217 is a deficient number, since it is larger than the sum of its proper divisors (336799).

42757217 is a wasteful number, since it uses less digits than its factorization.

42757217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336798.

The product of its digits is 27440, while the sum is 35.

The square root of 42757217 is about 6538.9002898041. The cubic root of 42757217 is about 349.6792081094.

The spelling of 42757217 in words is "forty-two million, seven hundred fifty-seven thousand, two hundred seventeen".