71428559 has 2 divisors, whose sum is σ = 71428560. Its totient is φ = 71428558.

The previous prime is 71428549. The next prime is 71428571. The reversal of 71428559 is 95582417.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71428559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71428549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35714279 + 35714280.

It is an arithmetic number, because the mean of its divisors is an integer number (35714280).

Almost surely, 2^71428559 is an apocalyptic number.

71428559 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428559 is an equidigital number, since it uses as much as digits as its factorization.

71428559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 71428559 is about 8451.5418120009. The cubic root of 71428559 is about 414.9132426182.

The spelling of 71428559 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred fifty-nine".