4545545 has 16 divisors (see below), whose sum is σ = 5890320. Its totient is φ = 3354624.

The previous prime is 4545521. The next prime is 4545551. The reversal of 4545545 is 5455454.

It can be written as a sum of positive squares in 8 ways, for example, as 38416 + 4507129 = 196^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 4545545 - 2¹⁸ = 4283401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4001 + ... + 5009.

It is an arithmetic number, because the mean of its divisors is an integer number (368145).

Almost surely, 2^4545545 is an apocalyptic number.

It is an amenable number.

4545545 is a deficient number, since it is larger than the sum of its proper divisors (1344775).

4545545 is a wasteful number, since it uses less digits than its factorization.

4545545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its digits is 40000, while the sum is 32.

The square root of 4545545 is about 2132.0283769218. The cubic root of 4545545 is about 165.6514800429.

Subtracting 4545545 from its reverse (5455454), we obtain a palindrome (909909).

The spelling of 4545545 in words is "four million, five hundred forty-five thousand, five hundred forty-five".