71057085 has 16 divisors (see below), whose sum is σ = 124027200. Its totient is φ = 34451840.

The previous prime is 71057083. The next prime is 71057087. The reversal of 71057085 is 58075017.

It is an interprime number because it is at equal distance from previous prime (71057083) and next prime (71057087).

It is not a de Polignac number, because 71057085 - 2¹ = 71057083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71057081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215160 + ... + 215489.

It is an arithmetic number, because the mean of its divisors is an integer number (7751700).

Almost surely, 2^71057085 is an apocalyptic number.

It is an amenable number.

71057085 is a deficient number, since it is larger than the sum of its proper divisors (52970115).

71057085 is a wasteful number, since it uses less digits than its factorization.

71057085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430668.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 71057085 is about 8429.5364641242. The cubic root of 71057085 is about 414.1927210732.

The spelling of 71057085 in words is "seventy-one million, fifty-seven thousand, eighty-five".