42707971 has 2 divisors, whose sum is σ = 42707972. Its totient is φ = 42707970.

The previous prime is 42707963. The next prime is 42707989. The reversal of 42707971 is 17970724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42707971 - 2³ = 42707963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42707971.

It is not a weakly prime, because it can be changed into another prime (42702971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353985 + 21353986.

It is an arithmetic number, because the mean of its divisors is an integer number (21353986).

Almost surely, 2^42707971 is an apocalyptic number.

42707971 is a deficient number, since it is larger than the sum of its proper divisors (1).

42707971 is an equidigital number, since it uses as much as digits as its factorization.

42707971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 42707971 is about 6535.1335870049. The cubic root of 42707971 is about 349.5449078366.

The spelling of 42707971 in words is "forty-two million, seven hundred seven thousand, nine hundred seventy-one".