11144991 has 32 divisors (see below), whose sum is σ = 17724672. Its totient is φ = 6140160.

The previous prime is 11144957. The next prime is 11145007. The reversal of 11144991 is 19944111.

11144991 = T₁₄₁₈ + T₁₄₁₉ + ... + T₁₄₂₈.

It is not a de Polignac number, because 11144991 - 2⁷ = 11144863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11144951) 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 31 ways as a sum of consecutive naturals, for example, 35451 + ... + 35763.

It is an arithmetic number, because the mean of its divisors is an integer number (553896).

Almost surely, 2^11144991 is an apocalyptic number.

11144991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11144991 is a deficient number, since it is larger than the sum of its proper divisors (6579681).

11144991 is a wasteful number, since it uses less digits than its factorization.

11144991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its digits is 1296, while the sum is 30.

The square root of 11144991 is about 3338.4114485785. The cubic root of 11144991 is about 223.3708897015.

It can be divided in two parts, 1114 and 4991, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 11144991 in words is "eleven million, one hundred forty-four thousand, nine hundred ninety-one".