1081705671 has 20 divisors (see below), whose sum is σ = 1616767152. Its totient is φ = 720741888.

The previous prime is 1081705627. The next prime is 1081705679. The reversal of 1081705671 is 1765071801.

It is a happy number.

1081705671 is a `hidden beast` number, since 10 + 81 + 7 + 0 + 567 + 1 = 666.

It is not a de Polignac number, because 1081705671 - 2⁷ = 1081705543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081705679) 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 19 ways as a sum of consecutive naturals, for example, 278086 + ... + 281948.

Almost surely, 2^1081705671 is an apocalyptic number.

1081705671 is a deficient number, since it is larger than the sum of its proper divisors (535061481).

1081705671 is an equidigital number, since it uses as much as digits as its factorization.

1081705671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332 (or 7323 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The square root of 1081705671 is about 32889.2941699879. The cubic root of 1081705671 is about 1026.5254054651.

The spelling of 1081705671 in words is "one billion, eighty-one million, seven hundred five thousand, six hundred seventy-one".