71641025 has 6 divisors (see below), whose sum is σ = 88834902. Its totient is φ = 57312800.

The previous prime is 71640979. The next prime is 71641033. The reversal of 71641025 is 52014617.

It can be written as a sum of positive squares in 3 ways, for example, as 339889 + 71301136 = 583^2 + 8444^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71641025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71640985 and 71641003.

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 5 ways as a sum of consecutive naturals, for example, 1432796 + ... + 1432845.

It is an arithmetic number, because the mean of its divisors is an integer number (14805817).

Almost surely, 2^71641025 is an apocalyptic number.

It is an amenable number.

71641025 is a deficient number, since it is larger than the sum of its proper divisors (17193877).

71641025 is a wasteful number, since it uses less digits than its factorization.

71641025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865651 (or 2865646 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71641025 is about 8464.1021378525. The cubic root of 71641025 is about 415.3242252654.

The spelling of 71641025 in words is "seventy-one million, six hundred forty-one thousand, twenty-five".