71428243 has 2 divisors, whose sum is σ = 71428244. Its totient is φ = 71428242.

The previous prime is 71428213. The next prime is 71428319. The reversal of 71428243 is 34282417.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71428243 is a prime.

It is not a weakly prime, because it can be changed into another prime (71428213) 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, 35714121 + 35714122.

It is an arithmetic number, because the mean of its divisors is an integer number (35714122).

Almost surely, 2^71428243 is an apocalyptic number.

71428243 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428243 is an equidigital number, since it uses as much as digits as its factorization.

71428243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 71428243 is about 8451.5231171665. The cubic root of 71428243 is about 414.9126307584.

The spelling of 71428243 in words is "seventy-one million, four hundred twenty-eight thousand, two hundred forty-three".