2045545 has 8 divisors (see below), whose sum is σ = 2521224. Its totient is φ = 1592064.

The previous prime is 2045543. The next prime is 2045557. The reversal of 2045545 is 5455402.

It can be written as a sum of positive squares in 4 ways, for example, as 281961 + 1763584 = 531^2 + 1328^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2045545 - 2¹ = 2045543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5344 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (315153).

2^2045545 is an apocalyptic number.

It is an amenable number.

2045545 is a deficient number, since it is larger than the sum of its proper divisors (475679).

2045545 is a wasteful number, since it uses less digits than its factorization.

2045545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099.

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

The square root of 2045545 is about 1430.2255066947. The cubic root of 2045545 is about 126.9413207747.

The spelling of 2045545 in words is "two million, forty-five thousand, five hundred forty-five".