4991012 has 24 divisors (see below), whose sum is σ = 9639672. Its totient is φ = 2246400.

The previous prime is 4991011. The next prime is 4991029. The reversal of 4991012 is 2101994.

It can be written as a sum of positive squares in 4 ways, for example, as 256 + 4990756 = 16^2 + 2234^2 .

It is a super-3 number, since 3×4991012³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962 + ... + 3302.

It is an arithmetic number, because the mean of its divisors is an integer number (401653).

Almost surely, 2^4991012 is an apocalyptic number.

It is an amenable number.

4991012 is a deficient number, since it is larger than the sum of its proper divisors (4648660).

4991012 is a wasteful number, since it uses less digits than its factorization.

4991012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4991012 is about 2234.0572955947. The cubic root of 4991012 is about 170.8950714525.

The spelling of 4991012 in words is "four million, nine hundred ninety-one thousand, twelve".