1000045 has 4 divisors (see below), whose sum is σ = 1200060. Its totient is φ = 800032.

The previous prime is 1000039. The next prime is 1000081. The reversal of 1000045 is 5400001.

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 191844 + 808201 = 438^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000045 - 2³ = 1000037 is a prime.

1000045 is a modest number, since divided by 45 gives 10 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 999995 and 1000040.

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 3 ways as a sum of consecutive naturals, for example, 100000 + ... + 100009.

It is an arithmetic number, because the mean of its divisors is an integer number (300015).

2^1000045 is an apocalyptic number.

It is an amenable number.

1000045 is a deficient number, since it is larger than the sum of its proper divisors (200015).

1000045 is an equidigital number, since it uses as much as digits as its factorization.

1000045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200014.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1000045 is about 1000.0224997469. The cubic root of 1000045 is about 100.0014999775.

Adding to 1000045 its reverse (5400001), we get a palindrome (6400046).

The spelling of 1000045 in words is "one million, forty-five", and thus it is an aban number and an uban number.