1071646385 has 4 divisors (see below), whose sum is σ = 1285975668. Its totient is φ = 857317104.

The previous prime is 1071646349. The next prime is 1071646393. The reversal of 1071646385 is 5836461701.

1071646385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177875569 + 893770816 = 13337^2 + 29896^2 .

It is a cyclic number.

It is not a de Polignac number, because 1071646385 - 2⁶ = 1071646321 is a prime.

It is a super-2 number, since 2×1071646385² = 2296851948967136450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107164634 + ... + 107164643.

It is an arithmetic number, because the mean of its divisors is an integer number (321493917).

Almost surely, 2^1071646385 is an apocalyptic number.

It is an amenable number.

1071646385 is a deficient number, since it is larger than the sum of its proper divisors (214329283).

1071646385 is an equidigital number, since it uses as much as digits as its factorization.

1071646385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214329282.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1071646385 is about 32736.0105235809. The cubic root of 1071646385 is about 1023.3334440919. Note that the first 3 decimals are identical.

The spelling of 1071646385 in words is "one billion, seventy-one million, six hundred forty-six thousand, three hundred eighty-five".