1001045 has 8 divisors (see below), whose sum is σ = 1272024. Its totient is φ = 753664.

The previous prime is 1001041. The next prime is 1001069. The reversal of 1001045 is 5401001.

1001045 = T₁₀₉ + T₁₁₀ + ... + T₁₉₃.

It can be written as a sum of positive squares in 4 ways, for example, as 293764 + 707281 = 542^2 + 841^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1001045 - 2² = 1001041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001041) 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 7 ways as a sum of consecutive naturals, for example, 5804 + ... + 5973.

It is an arithmetic number, because the mean of its divisors is an integer number (159003).

2^1001045 is an apocalyptic number.

It is an amenable number.

1001045 is a deficient number, since it is larger than the sum of its proper divisors (270979).

1001045 is a wasteful number, since it uses less digits than its factorization.

1001045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11799.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1001045 is about 1000.5223635682. The cubic root of 1001045 is about 100.0348212068.

Adding to 1001045 its reverse (5401001), we get a palindrome (6402046).

The spelling of 1001045 in words is "one million, one thousand, forty-five".