71012513 has 16 divisors (see below), whose sum is σ = 83985216. Its totient is φ = 59192640.

The previous prime is 71012507. The next prime is 71012531. The reversal of 71012513 is 31521017.

It is not a de Polignac number, because 71012513 - 2⁴ = 71012497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71012573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20870 + ... + 24032.

It is an arithmetic number, because the mean of its divisors is an integer number (5249076).

Almost surely, 2^71012513 is an apocalyptic number.

It is an amenable number.

71012513 is a deficient number, since it is larger than the sum of its proper divisors (12972703).

71012513 is a wasteful number, since it uses less digits than its factorization.

71012513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 71012513 is about 8426.8922504088. The cubic root of 71012513 is about 414.1060993596.

The spelling of 71012513 in words is "seventy-one million, twelve thousand, five hundred thirteen".