4991305 has 16 divisors (see below), whose sum is σ = 6588288. Its totient is φ = 3600000.

The previous prime is 4991303. The next prime is 4991317. The reversal of 4991305 is 5031994.

It is not a de Polignac number, because 4991305 - 2¹ = 4991303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4991303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8005 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (411768).

Almost surely, 2^4991305 is an apocalyptic number.

It is an amenable number.

4991305 is a deficient number, since it is larger than the sum of its proper divisors (1596983).

4991305 is a wasteful number, since it uses less digits than its factorization.

4991305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4991305 is about 2234.1228703901. The cubic root of 4991305 is about 170.8984155489.

The spelling of 4991305 in words is "four million, nine hundred ninety-one thousand, three hundred five".