42171011 has 2 divisors, whose sum is σ = 42171012. Its totient is φ = 42171010.

The previous prime is 42170977. The next prime is 42171043. The reversal of 42171011 is 11017124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42171011 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42171061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085505 + 21085506.

It is an arithmetic number, because the mean of its divisors is an integer number (21085506).

Almost surely, 2^42171011 is an apocalyptic number.

42171011 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171011 is an equidigital number, since it uses as much as digits as its factorization.

42171011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 42171011 is about 6493.9210805183. The cubic root of 42171011 is about 348.0738024429.

Adding to 42171011 its reverse (11017124), we get a palindrome (53188135).

The spelling of 42171011 in words is "forty-two million, one hundred seventy-one thousand, eleven".