71285029 has 6 divisors (see below), whose sum is σ = 75725234. Its totient is φ = 67091520.

The previous prime is 71285023. The next prime is 71285047. The reversal of 71285029 is 92058217.

It can be written as a sum of positive squares in 3 ways, for example, as 44916804 + 26368225 = 6702^2 + 5135^2 .

It is not a de Polignac number, because 71285029 - 2³ = 71285021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71284985 and 71285003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71285021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123042 + ... + 123619.

Almost surely, 2^71285029 is an apocalyptic number.

It is an amenable number.

71285029 is a deficient number, since it is larger than the sum of its proper divisors (4440205).

71285029 is a wasteful number, since it uses less digits than its factorization.

71285029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246695 (or 246678 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 71285029 is about 8443.0461919854. The cubic root of 71285029 is about 414.6351445586.

The spelling of 71285029 in words is "seventy-one million, two hundred eighty-five thousand, twenty-nine".