4991445 has 12 divisors (see below), whose sum is σ = 8651916. Its totient is φ = 2662080.

The previous prime is 4991431. The next prime is 4991449. The reversal of 4991445 is 5441994.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 505521 + 4485924 = 711^2 + 2118^2 .

It is not a de Polignac number, because 4991445 - 2⁴ = 4991429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55416 + ... + 55505.

It is an arithmetic number, because the mean of its divisors is an integer number (720993).

Almost surely, 2^4991445 is an apocalyptic number.

4991445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4991445 is a deficient number, since it is larger than the sum of its proper divisors (3660471).

4991445 is a wasteful number, since it uses less digits than its factorization.

4991445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110932 (or 110929 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 4991445 is about 2234.1542023773. The cubic root of 4991445 is about 170.9000133645.

The spelling of 4991445 in words is "four million, nine hundred ninety-one thousand, four hundred forty-five".