71145559 has 2 divisors, whose sum is σ = 71145560. Its totient is φ = 71145558.

The previous prime is 71145553. The next prime is 71145577. The reversal of 71145559 is 95554117.

It is a weak prime.

It is an emirp because it is prime and its reverse (95554117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71145559 - 2³ = 71145551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71145551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35572779 + 35572780.

It is an arithmetic number, because the mean of its divisors is an integer number (35572780).

Almost surely, 2^71145559 is an apocalyptic number.

71145559 is a deficient number, since it is larger than the sum of its proper divisors (1).

71145559 is an equidigital number, since it uses as much as digits as its factorization.

71145559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 37.

The square root of 71145559 is about 8434.7826883684. The cubic root of 71145559 is about 414.3645551611.

The spelling of 71145559 in words is "seventy-one million, one hundred forty-five thousand, five hundred fifty-nine".