11491012 has 24 divisors (see below), whose sum is σ = 21827736. Its totient is φ = 5261568.

The previous prime is 11491009. The next prime is 11491013. The reversal of 11491012 is 21019411.

It can be written as a sum of positive squares in 4 ways, for example, as 1032256 + 10458756 = 1016^2 + 3234^2 .

It is not an unprimeable number, because it can be changed into a prime (11491013) 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, 6318 + ... + 7930.

It is an arithmetic number, because the mean of its divisors is an integer number (909489).

Almost surely, 2^11491012 is an apocalyptic number.

It is an amenable number.

11491012 is a deficient number, since it is larger than the sum of its proper divisors (10336724).

11491012 is a wasteful number, since it uses less digits than its factorization.

11491012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 11491012 is about 3389.8395242253. The cubic root of 11491012 is about 225.6590520347.

The spelling of 11491012 in words is "eleven million, four hundred ninety-one thousand, twelve".