42471907 has 2 divisors, whose sum is σ = 42471908. Its totient is φ = 42471906.

The previous prime is 42471889. The next prime is 42471929. The reversal of 42471907 is 70917424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42471907 is a prime.

It is not a weakly prime, because it can be changed into another prime (42471937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21235953 + 21235954.

It is an arithmetic number, because the mean of its divisors is an integer number (21235954).

Almost surely, 2^42471907 is an apocalyptic number.

42471907 is a deficient number, since it is larger than the sum of its proper divisors (1).

42471907 is an equidigital number, since it uses as much as digits as its factorization.

42471907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 42471907 is about 6517.0474142820. The cubic root of 42471907 is about 348.8996928503.

The spelling of 42471907 in words is "forty-two million, four hundred seventy-one thousand, nine hundred seven".