4491045 has 40 divisors (see below), whose sum is σ = 8680056. Its totient is φ = 2208384.

The previous prime is 4491037. The next prime is 4491079. The reversal of 4491045 is 5401944.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 4397409 = 306^2 + 2097^2 .

It is not a de Polignac number, because 4491045 - 2³ = 4491037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4839 + ... + 5691.

Almost surely, 2^4491045 is an apocalyptic number.

4491045 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4491045 is a deficient number, since it is larger than the sum of its proper divisors (4189011).

4491045 is a wasteful number, since it uses less digits than its factorization.

4491045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 4491045 is about 2119.2085786916. The cubic root of 4491045 is about 164.9867757997.

Adding to 4491045 its reverse (5401944), we get a palindrome (9892989).

The spelling of 4491045 in words is "four million, four hundred ninety-one thousand, forty-five".