71671825 has 6 divisors (see below), whose sum is σ = 88873094. Its totient is φ = 57337440.

The previous prime is 71671823. The next prime is 71671871. The reversal of 71671825 is 52817617.

It can be written as a sum of positive squares in 3 ways, for example, as 15586704 + 56085121 = 3948^2 + 7489^2 .

It is not a de Polignac number, because 71671825 - 2¹ = 71671823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71671823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1433412 + ... + 1433461.

Almost surely, 2^71671825 is an apocalyptic number.

It is an amenable number.

71671825 is a deficient number, since it is larger than the sum of its proper divisors (17201269).

71671825 is a wasteful number, since it uses less digits than its factorization.

71671825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866883 (or 2866878 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 71671825 is about 8465.9213910832. The cubic root of 71671825 is about 415.3837356432.

The spelling of 71671825 in words is "seventy-one million, six hundred seventy-one thousand, eight hundred twenty-five".