71428571 has 2 divisors, whose sum is σ = 71428572.
Its totient is φ = 71428570.
The previous prime is 71428559. The next prime is 71428583. The reversal of 71428571 is 17582417.
It is a balanced prime because it is at equal distance from previous prime (71428559) and next prime (71428583).
It is an emirp because it is prime and its reverse (17582417) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 71428571 - 26 = 71428507 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (71428531) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714285 + 35714286.
It is an arithmetic number, because the mean of its divisors is an integer number (35714286).
Almost surely, 271428571 is an apocalyptic number.
71428571 is a deficient number, since it is larger than the sum of its proper divisors (1).
71428571 is an equidigital number, since it uses as much as digits as its factorization.
71428571 is an evil number, because the sum of its binary digits is even.
The product of its digits is 15680, while the sum is 35.
The square root of 71428571 is about 8451.5425219305.
The cubic root of 71428571 is about 414.9132658533.
The spelling of 71428571 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred seventy-one".