71267520 has 112 divisors (see below), whose sum is σ = 230172768. Its totient is φ = 18677760.

The previous prime is 71267509. The next prime is 71267527. The reversal of 71267520 is 2576217.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (71267527) 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 15 ways as a sum of consecutive naturals, for example, 57952 + ... + 59168.

It is an arithmetic number, because the mean of its divisors is an integer number (2055114).

Almost surely, 2^71267520 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 71267520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115086384).

71267520 is an abundant number, since it is smaller than the sum of its proper divisors (158905248).

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

71267520 is a wasteful number, since it uses less digits than its factorization.

71267520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 71267520 is about 8442.0092395116. The cubic root of 71267520 is about 414.6011942733.

The spelling of 71267520 in words is "seventy-one million, two hundred sixty-seven thousand, five hundred twenty".