71530641 has 48 divisors (see below), whose sum is σ = 132787200. Its totient is φ = 37721376.

The previous prime is 71530637. The next prime is 71530673. The reversal of 71530641 is 14603517.

71530641 is a `hidden beast` number, since 7 + 15 + 3 + 0 + 641 = 666.

It is not a de Polignac number, because 71530641 - 2² = 71530637 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (71530601) 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 47 ways as a sum of consecutive naturals, for example, 15120 + ... + 19278.

It is an arithmetic number, because the mean of its divisors is an integer number (2766400).

Almost surely, 2^71530641 is an apocalyptic number.

It is an amenable number.

71530641 is a deficient number, since it is larger than the sum of its proper divisors (61256559).

71530641 is a wasteful number, since it uses less digits than its factorization.

71530641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 71530641 is about 8457.5789088840. The cubic root of 71530641 is about 415.1108060436.

The spelling of 71530641 in words is "seventy-one million, five hundred thirty thousand, six hundred forty-one".