71405500 has 24 divisors (see below), whose sum is σ = 155950704. Its totient is φ = 28562000.

The previous prime is 71405497. The next prime is 71405507. The reversal of 71405500 is 550417.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71405507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70906 + ... + 71905.

It is an arithmetic number, because the mean of its divisors is an integer number (6497946).

Almost surely, 2^71405500 is an apocalyptic number.

It is an amenable number.

71405500 is an abundant number, since it is smaller than the sum of its proper divisors (84545204).

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

71405500 is a wasteful number, since it uses less digits than its factorization.

71405500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142830 (or 142818 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 71405500 is about 8450.1775129284. The cubic root of 71405500 is about 414.8685895442.

Adding to 71405500 its reverse (550417), we get a palindrome (71955917).

The spelling of 71405500 in words is "seventy-one million, four hundred five thousand, five hundred".