1204645 has 16 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 866880.

The previous prime is 1204633. The next prime is 1204649. The reversal of 1204645 is 5464021.

It is not a de Polignac number, because 1204645 - 2⁵ = 1204613 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 (1204649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2580 + ... + 3010.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2^1204645 is an apocalyptic number.

It is an amenable number.

1204645 is a deficient number, since it is larger than the sum of its proper divisors (392027).

1204645 is a wasteful number, since it uses less digits than its factorization.

1204645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1204645 is about 1097.5632100248. The cubic root of 1204645 is about 106.4027928583.

Adding to 1204645 its reverse (5464021), we get a palindrome (6668666).

It can be divided in two parts, 1204 and 645, that added together give a square (1849 = 43²).

The spelling of 1204645 in words is "one million, two hundred four thousand, six hundred forty-five".