42545171 has 2 divisors, whose sum is σ = 42545172. Its totient is φ = 42545170.

The previous prime is 42545159. The next prime is 42545179. The reversal of 42545171 is 17154524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42545171 - 2¹⁸ = 42283027 is a prime.

It is not a weakly prime, because it can be changed into another prime (42545179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272585 + 21272586.

It is an arithmetic number, because the mean of its divisors is an integer number (21272586).

Almost surely, 2^42545171 is an apocalyptic number.

42545171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42545171 is an equidigital number, since it uses as much as digits as its factorization.

42545171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 29.

The square root of 42545171 is about 6522.6659426955. The cubic root of 42545171 is about 349.1001948209.

Adding to 42545171 its reverse (17154524), we get a palindrome (59699695).

The spelling of 42545171 in words is "forty-two million, five hundred forty-five thousand, one hundred seventy-one".