71895057 has 16 divisors (see below), whose sum is σ = 109307520. Its totient is φ = 41640192.

The previous prime is 71895053. The next prime is 71895059. The reversal of 71895057 is 75059817.

It is not a de Polignac number, because 71895057 - 2² = 71895053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71895053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53557 + ... + 54882.

It is an arithmetic number, because the mean of its divisors is an integer number (6831720).

Almost surely, 2^71895057 is an apocalyptic number.

It is an amenable number.

71895057 is a deficient number, since it is larger than the sum of its proper divisors (37412463).

71895057 is a wasteful number, since it uses less digits than its factorization.

71895057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108472.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 71895057 is about 8479.0952937209. The cubic root of 71895057 is about 415.8145457416.

It can be divided in two parts, 7189 and 5057, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 71895057 in words is "seventy-one million, eight hundred ninety-five thousand, fifty-seven".