71520867 has 16 divisors (see below), whose sum is σ = 115589760. Its totient is φ = 43345800.

The previous prime is 71520859. The next prime is 71520871. The reversal of 71520867 is 76802517.

71520867 is a `hidden beast` number, since 71 + 520 + 8 + 67 = 666.

It is not a de Polignac number, because 71520867 - 2³ = 71520859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71520817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120109 + ... + 120702.

It is an arithmetic number, because the mean of its divisors is an integer number (7224360).

Almost surely, 2^71520867 is an apocalyptic number.

71520867 is a deficient number, since it is larger than the sum of its proper divisors (44068893).

71520867 is a wasteful number, since it uses less digits than its factorization.

71520867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240831 (or 240825 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 71520867 is about 8457.0010642071. The cubic root of 71520867 is about 415.0918981659.

The spelling of 71520867 in words is "seventy-one million, five hundred twenty thousand, eight hundred sixty-seven".