4204645 has 4 divisors (see below), whose sum is σ = 5045580. Its totient is φ = 3363712.

The previous prime is 4204639. The next prime is 4204657. The reversal of 4204645 is 5464024.

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 2762244 + 1442401 = 1662^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 4204645 - 2⁹ = 4204133 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 2¹¹ + 0 + 4⁴ + 6⁵ + 4¹¹ + 5 .

4204645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420460 + ... + 420469.

It is an arithmetic number, because the mean of its divisors is an integer number (1261395).

Almost surely, 2^4204645 is an apocalyptic number.

It is an amenable number.

4204645 is a deficient number, since it is larger than the sum of its proper divisors (840935).

4204645 is an equidigital number, since it uses as much as digits as its factorization.

4204645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840934.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4204645 is about 2050.5231039908. The cubic root of 4204645 is about 161.4023218640.

Adding to 4204645 its reverse (5464024), we get a palindrome (9668669).

The spelling of 4204645 in words is "four million, two hundred four thousand, six hundred forty-five".