71125560 has 128 divisors (see below), whose sum is σ = 258681600. Its totient is φ = 17239680.

The previous prime is 71125543. The next prime is 71125601. The reversal of 71125560 is 6552117.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8887 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (2020950).

Almost surely, 2^71125560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71125560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129340800).

71125560 is an abundant number, since it is smaller than the sum of its proper divisors (187556040).

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

71125560 is a wasteful number, since it uses less digits than its factorization.

71125560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018 (or 6008 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 71125560 is about 8433.5970973245. The cubic root of 71125560 is about 414.3257255960.

Adding to 71125560 its reverse (6552117), we get a palindrome (77677677).

The spelling of 71125560 in words is "seventy-one million, one hundred twenty-five thousand, five hundred sixty".