42571217 has 8 divisors (see below), whose sum is σ = 47427240. Its totient is φ = 37941120.

The previous prime is 42571211. The next prime is 42571241. The reversal of 42571217 is 71217524.

It can be written as a sum of positive squares in 4 ways, for example, as 13075456 + 29495761 = 3616^2 + 5431^2 .

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 42571217 - 2¹⁴ = 42554833 is a prime.

It is a super-2 number, since 2×42571217² = 3624617033722178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42571217.

It is not an unprimeable number, because it can be changed into a prime (42571211) 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, 56084 + ... + 56837.

It is an arithmetic number, because the mean of its divisors is an integer number (5928405).

Almost surely, 2^42571217 is an apocalyptic number.

It is an amenable number.

42571217 is a deficient number, since it is larger than the sum of its proper divisors (4856023).

42571217 is a wasteful number, since it uses less digits than its factorization.

42571217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112963.

The product of its digits is 3920, while the sum is 29.

The square root of 42571217 is about 6524.6622134789. The cubic root of 42571217 is about 349.1714195811.

The spelling of 42571217 in words is "forty-two million, five hundred seventy-one thousand, two hundred seventeen".