71285122 has 4 divisors (see below), whose sum is σ = 106927686. Its totient is φ = 35642560.

The previous prime is 71285117. The next prime is 71285143. The reversal of 71285122 is 22158217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22158217 = 59 ⋅375563.

It can be written as a sum of positive squares in only one way, i.e., 61606801 + 9678321 = 7849^2 + 3111^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17821279 + ... + 17821282.

Almost surely, 2^71285122 is an apocalyptic number.

71285122 is a deficient number, since it is larger than the sum of its proper divisors (35642564).

71285122 is a wasteful number, since it uses less digits than its factorization.

71285122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35642563.

The product of its digits is 2240, while the sum is 28.

The square root of 71285122 is about 8443.0516994745. The cubic root of 71285122 is about 414.6353248725.

The spelling of 71285122 in words is "seventy-one million, two hundred eighty-five thousand, one hundred twenty-two".