71671925 has 12 divisors (see below), whose sum is σ = 95710020. Its totient is φ = 52926720.

The previous prime is 71671921. The next prime is 71671981. The reversal of 71671925 is 52917617.

It can be written as a sum of positive squares in 6 ways, for example, as 21743569 + 49928356 = 4663^2 + 7066^2 .

It is not a de Polignac number, because 71671925 - 2² = 71671921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71671921) 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 11 ways as a sum of consecutive naturals, for example, 109940 + ... + 110589.

It is an arithmetic number, because the mean of its divisors is an integer number (7975835).

Almost surely, 2^71671925 is an apocalyptic number.

It is an amenable number.

71671925 is a deficient number, since it is larger than the sum of its proper divisors (24038095).

71671925 is a wasteful number, since it uses less digits than its factorization.

71671925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220552 (or 220547 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 71671925 is about 8465.9272971128. The cubic root of 71671925 is about 415.3839288309.

The spelling of 71671925 in words is "seventy-one million, six hundred seventy-one thousand, nine hundred twenty-five".