42628171 has 2 divisors, whose sum is σ = 42628172. Its totient is φ = 42628170.

The previous prime is 42628133. The next prime is 42628189. The reversal of 42628171 is 17182624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42628171 - 2⁷ = 42628043 is a prime.

It is not a weakly prime, because it can be changed into another prime (42628111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21314085 + 21314086.

It is an arithmetic number, because the mean of its divisors is an integer number (21314086).

Almost surely, 2^42628171 is an apocalyptic number.

42628171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42628171 is an equidigital number, since it uses as much as digits as its factorization.

42628171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 42628171 is about 6529.0252718151. The cubic root of 42628171 is about 349.3270634529.

The spelling of 42628171 in words is "forty-two million, six hundred twenty-eight thousand, one hundred seventy-one".