4205545 has 8 divisors (see below), whose sum is σ = 5343624. Its totient is φ = 3166464.

The previous prime is 4205533. The next prime is 4205549. The reversal of 4205545 is 5455024.

It can be written as a sum of positive squares in 4 ways, for example, as 426409 + 3779136 = 653^2 + 1944^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4205545 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 (4205549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24654 + ... + 24823.

It is an arithmetic number, because the mean of its divisors is an integer number (667953).

Almost surely, 2^4205545 is an apocalyptic number.

It is an amenable number.

4205545 is a deficient number, since it is larger than the sum of its proper divisors (1138079).

4205545 is a wasteful number, since it uses less digits than its factorization.

4205545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49499.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 4205545 is about 2050.7425484443. The cubic root of 4205545 is about 161.4138370435.

The spelling of 4205545 in words is "four million, two hundred five thousand, five hundred forty-five".