71671465 has 8 divisors (see below), whose sum is σ = 86072328. Its totient is φ = 57292800.

The previous prime is 71671463. The next prime is 71671471. The reversal of 71671465 is 56417617.

It can be written as a sum of positive squares in 4 ways, for example, as 28164249 + 43507216 = 5307^2 + 6596^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71671465 - 2¹ = 71671463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71671463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2665 + ... + 12265.

It is an arithmetic number, because the mean of its divisors is an integer number (10759041).

Almost surely, 2^71671465 is an apocalyptic number.

It is an amenable number.

71671465 is a deficient number, since it is larger than the sum of its proper divisors (14400863).

71671465 is a wasteful number, since it uses less digits than its factorization.

71671465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099.

The product of its digits is 35280, while the sum is 37.

The square root of 71671465 is about 8465.9001293424. The cubic root of 71671465 is about 415.3830401658.

The spelling of 71671465 in words is "seventy-one million, six hundred seventy-one thousand, four hundred sixty-five".