71061500 has 24 divisors (see below), whose sum is σ = 155199408. Its totient is φ = 28424400.

The previous prime is 71061493. The next prime is 71061511. The reversal of 71061500 is 516017.

71061500 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

71061500 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70562 + ... + 71561.

It is an arithmetic number, because the mean of its divisors is an integer number (6466642).

Almost surely, 2^71061500 is an apocalyptic number.

It is an amenable number.

71061500 is an abundant number, since it is smaller than the sum of its proper divisors (84137908).

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

71061500 is a wasteful number, since it uses less digits than its factorization.

71061500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142142 (or 142130 counting only the distinct ones).

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

The square root of 71061500 is about 8429.7983368524. The cubic root of 71061500 is about 414.2012992607.

Adding to 71061500 its reverse (516017), we get a palindrome (71577517).

The spelling of 71061500 in words is "seventy-one million, sixty-one thousand, five hundred".