71641825 has 24 divisors (see below), whose sum is σ = 95049720. Its totient is φ = 53376000.

The previous prime is 71641813. The next prime is 71641853. The reversal of 71641825 is 52814617.

It can be written as a sum of positive squares in 12 ways, for example, as 425104 + 71216721 = 652^2 + 8439^2 .

It is not a de Polignac number, because 71641825 - 2⁷ = 71641697 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 42091 + ... + 43759.

It is an arithmetic number, because the mean of its divisors is an integer number (3960405).

Almost surely, 2^71641825 is an apocalyptic number.

It is an amenable number.

71641825 is a deficient number, since it is larger than the sum of its proper divisors (23407895).

71641825 is a wasteful number, since it uses less digits than its factorization.

71641825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1792 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 71641825 is about 8464.1493961295. The cubic root of 71641825 is about 415.3257712052.

The spelling of 71641825 in words is "seventy-one million, six hundred forty-one thousand, eight hundred twenty-five".