71013870 has 48 divisors (see below), whose sum is σ = 190599552. Its totient is φ = 18325440.

The previous prime is 71013869. The next prime is 71013871. The reversal of 71013870 is 7831017.

It is an interprime number because it is at equal distance from previous prime (71013869) and next prime (71013871).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71013871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9937 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (3970824).

Almost surely, 2^71013870 is an apocalyptic number.

71013870 is an abundant number, since it is smaller than the sum of its proper divisors (119585682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71013870 is a wasteful number, since it uses less digits than its factorization.

71013870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25497 (or 25494 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 71013870 is about 8426.9727660649. The cubic root of 71013870 is about 414.1087371032.

Adding to 71013870 its reverse (7831017), we get a palindrome (78844887).

The spelling of 71013870 in words is "seventy-one million, thirteen thousand, eight hundred seventy".