2001745 has 12 divisors (see below), whose sum is σ = 2537460. Its totient is φ = 1515744.

The previous prime is 2001731. The next prime is 2001751. The reversal of 2001745 is 5471002.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 1718721 = 532^2 + 1311^2 .

It is not a de Polignac number, because 2001745 - 2⁷ = 2001617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1251 + ... + 2359.

It is an arithmetic number, because the mean of its divisors is an integer number (211455).

2^2001745 is an apocalyptic number.

It is an amenable number.

2001745 is a deficient number, since it is larger than the sum of its proper divisors (535715).

2001745 is a wasteful number, since it uses less digits than its factorization.

2001745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2001745 is about 1414.8303785260. The cubic root of 2001745 is about 126.0287370416.

Adding to 2001745 its reverse (5471002), we get a palindrome (7472747).

The spelling of 2001745 in words is "two million, one thousand, seven hundred forty-five".