11251791 has 20 divisors (see below), whose sum is σ = 17354304. Its totient is φ = 7257600.

The previous prime is 11251789. The next prime is 11251817. The reversal of 11251791 is 19715211.

It is not a de Polignac number, because 11251791 - 2¹ = 11251789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11251771) 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 19 ways as a sum of consecutive naturals, for example, 271 + ... + 4751.

Almost surely, 2^11251791 is an apocalyptic number.

11251791 is a deficient number, since it is larger than the sum of its proper divisors (6102513).

11251791 is an equidigital number, since it uses as much as digits as its factorization.

11251791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524 (or 4515 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 11251791 is about 3354.3689421410. The cubic root of 11251791 is about 224.0821273575.

It can be divided in two parts, 1125 and 1791, that added together give a square (2916 = 54²).

The spelling of 11251791 in words is "eleven million, two hundred fifty-one thousand, seven hundred ninety-one".