71235009 has 12 divisors (see below), whose sum is σ = 108310800. Its totient is φ = 44990424.

The previous prime is 71235001. The next prime is 71235013. The reversal of 71235009 is 90053217.

It is not a de Polignac number, because 71235009 - 2³ = 71235001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71235001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208119 + ... + 208460.

It is an arithmetic number, because the mean of its divisors is an integer number (9025900).

Almost surely, 2^71235009 is an apocalyptic number.

It is an amenable number.

71235009 is a deficient number, since it is larger than the sum of its proper divisors (37075791).

71235009 is a wasteful number, since it uses less digits than its factorization.

71235009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416604 (or 416601 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 71235009 is about 8440.0834711512. The cubic root of 71235009 is about 414.5381400723.

It can be divided in two parts, 712 and 35009, that added together give a square (35721 = 189²).

The spelling of 71235009 in words is "seventy-one million, two hundred thirty-five thousand, nine".