42248971 has 2 divisors, whose sum is σ = 42248972. Its totient is φ = 42248970.

The previous prime is 42248929. The next prime is 42248981. The reversal of 42248971 is 17984224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42248971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42248971.

It is not a weakly prime, because it can be changed into another prime (42248981) 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, 21124485 + 21124486.

It is an arithmetic number, because the mean of its divisors is an integer number (21124486).

Almost surely, 2^42248971 is an apocalyptic number.

42248971 is a deficient number, since it is larger than the sum of its proper divisors (1).

42248971 is an equidigital number, since it uses as much as digits as its factorization.

42248971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 42248971 is about 6499.9208456719. The cubic root of 42248971 is about 348.2881608254.

The spelling of 42248971 in words is "forty-two million, two hundred forty-eight thousand, nine hundred seventy-one".