2006945 has 8 divisors (see below), whose sum is σ = 2491560. Its totient is φ = 1550080.

The previous prime is 2006929. The next prime is 2006959. The reversal of 2006945 is 5496002.

It can be written as a sum of positive squares in 4 ways, for example, as 113569 + 1893376 = 337^2 + 1376^2 .

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

It is not a de Polignac number, because 2006945 - 2⁴ = 2006929 is a prime.

It is an unprimeable number.

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, 6776 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (311445).

2^2006945 is an apocalyptic number.

It is an amenable number.

2006945 is a deficient number, since it is larger than the sum of its proper divisors (484615).

2006945 is a wasteful number, since it uses less digits than its factorization.

2006945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13875.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2006945 is about 1416.6668627451. Note that the first 3 decimals coincide. The cubic root of 2006945 is about 126.1377723709.

The spelling of 2006945 in words is "two million, six thousand, nine hundred forty-five".