1004645 has 4 divisors (see below), whose sum is σ = 1205580. Its totient is φ = 803712.

The previous prime is 1004599. The next prime is 1004651. The reversal of 1004645 is 5464001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5464001 = 19 ⋅287579.

It can be written as a sum of positive squares in 2 ways, for example, as 776161 + 228484 = 881^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004645 - 2¹⁰ = 1003621 is a prime.

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, 100460 + ... + 100469.

It is an arithmetic number, because the mean of its divisors is an integer number (301395).

2^1004645 is an apocalyptic number.

It is an amenable number.

1004645 is a deficient number, since it is larger than the sum of its proper divisors (200935).

1004645 is an equidigital number, since it uses as much as digits as its factorization.

1004645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200934.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1004645 is about 1002.3198092425. The cubic root of 1004645 is about 100.1545942165.

Adding to 1004645 its reverse (5464001), we get a palindrome (6468646).

The spelling of 1004645 in words is "one million, four thousand, six hundred forty-five".