42171707 has 2 divisors, whose sum is σ = 42171708. Its totient is φ = 42171706.

The previous prime is 42171677. The next prime is 42171721. The reversal of 42171707 is 70717124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42171707 - 2¹⁶ = 42106171 is a prime.

It is a Chen prime.

It is equal to p_2557415 and since 42171707 and 2557415 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42171707.

It is not a weakly prime, because it can be changed into another prime (42171907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085853 + 21085854.

It is an arithmetic number, because the mean of its divisors is an integer number (21085854).

Almost surely, 2^42171707 is an apocalyptic number.

42171707 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171707 is an equidigital number, since it uses as much as digits as its factorization.

42171707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 29.

The square root of 42171707 is about 6493.9746688758. The cubic root of 42171707 is about 348.0757173289.

The spelling of 42171707 in words is "forty-two million, one hundred seventy-one thousand, seven hundred seven".