78571 has 2 divisors, whose sum is σ = 78572. Its totient is φ = 78570.

The previous prime is 78569. The next prime is 78577. The reversal of 78571 is 17587.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78571 - 2¹ = 78569 is a prime.

Together with 78569, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (78577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285 + 39286.

It is an arithmetic number, because the mean of its divisors is an integer number (39286).

2⁷⁸⁵⁷¹ is an apocalyptic number.

78571 is a deficient number, since it is larger than the sum of its proper divisors (1).

78571 is an equidigital number, since it uses as much as digits as its factorization.

78571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 28.

The square root of 78571 is about 280.3051908189. The cubic root of 78571 is about 42.8305936095.

The spelling of 78571 in words is "seventy-eight thousand, five hundred seventy-one".