671271705 has 48 divisors (see below), whose sum is σ = 1299480000. Its totient is φ = 330464448.

The previous prime is 671271677. The next prime is 671271709. The reversal of 671271705 is 507172176.

It is not a de Polignac number, because 671271705 - 2¹¹ = 671269657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671271705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671271709) 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 47 ways as a sum of consecutive naturals, for example, 5455 + ... + 37044.

It is an arithmetic number, because the mean of its divisors is an integer number (27072500).

Almost surely, 2^671271705 is an apocalyptic number.

671271705 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

671271705 is a deficient number, since it is larger than the sum of its proper divisors (628208295).

671271705 is a wasteful number, since it uses less digits than its factorization.

671271705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42532 (or 42520 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 671271705 is about 25908.9116907677. The cubic root of 671271705 is about 875.5872868222.

The spelling of 671271705 in words is "six hundred seventy-one million, two hundred seventy-one thousand, seven hundred five".