42170571 has 16 divisors (see below), whose sum is σ = 64491520. Its totient is φ = 27206280.

The previous prime is 42170561. The next prime is 42170593. The reversal of 42170571 is 17507124.

42170571 is a `hidden beast` number, since 4 + 21 + 70 + 571 = 666.

42170571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42170571 - 2⁵ = 42170539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42170501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24355 + ... + 26028.

It is an arithmetic number, because the mean of its divisors is an integer number (4030720).

Almost surely, 2^42170571 is an apocalyptic number.

42170571 is a deficient number, since it is larger than the sum of its proper divisors (22320949).

42170571 is a wasteful number, since it uses less digits than its factorization.

42170571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50423 (or 50417 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 42170571 is about 6493.8872025929. The cubic root of 42170571 is about 348.0725918719.

Adding to 42170571 its reverse (17507124), we get a palindrome (59677695).

The spelling of 42170571 in words is "forty-two million, one hundred seventy thousand, five hundred seventy-one".