71122085 has 16 divisors (see below), whose sum is σ = 87862320. Its totient is φ = 55234560.

The previous prime is 71122027. The next prime is 71122147. The reversal of 71122085 is 58022117.

71122085 = T₃₇₂ + T₃₇₃ + ... + T₇₈₁.

It can be written as a sum of positive squares in 8 ways, for example, as 27019204 + 44102881 = 5198^2 + 6641^2 .

It is not a de Polignac number, because 71122085 - 2²² = 66927781 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47021 + ... + 48509.

It is an arithmetic number, because the mean of its divisors is an integer number (5491395).

Almost surely, 2^71122085 is an apocalyptic number.

It is an amenable number.

71122085 is a deficient number, since it is larger than the sum of its proper divisors (16740235).

71122085 is a wasteful number, since it uses less digits than its factorization.

71122085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 71122085 is about 8433.3910735836. The cubic root of 71122085 is about 414.3189778795.

The spelling of 71122085 in words is "seventy-one million, one hundred twenty-two thousand, eighty-five".