42250171 has 2 divisors, whose sum is σ = 42250172. Its totient is φ = 42250170.

The previous prime is 42250163. The next prime is 42250223. The reversal of 42250171 is 17105224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42250171 - 2³ = 42250163 is a prime.

It is not a weakly prime, because it can be changed into another prime (42254171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125085 + 21125086.

It is an arithmetic number, because the mean of its divisors is an integer number (21125086).

Almost surely, 2^42250171 is an apocalyptic number.

42250171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42250171 is an equidigital number, since it uses as much as digits as its factorization.

42250171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 42250171 is about 6500.0131538328. The cubic root of 42250171 is about 348.2914582772.

Adding to 42250171 its reverse (17105224), we get a palindrome (59355395).

The spelling of 42250171 in words is "forty-two million, two hundred fifty thousand, one hundred seventy-one".