11120391 has 12 divisors (see below), whose sum is σ = 16134768. Its totient is φ = 7380384.

The previous prime is 11120357. The next prime is 11120399. The reversal of 11120391 is 19302111.

It is not a de Polignac number, because 11120391 - 2⁶ = 11120327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120399) 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 11 ways as a sum of consecutive naturals, for example, 555 + ... + 4748.

It is an arithmetic number, because the mean of its divisors is an integer number (1344564).

Almost surely, 2^11120391 is an apocalyptic number.

11120391 is a deficient number, since it is larger than the sum of its proper divisors (5014377).

11120391 is a wasteful number, since it uses less digits than its factorization.

11120391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542 (or 5539 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 11120391 is about 3334.7250261453. The cubic root of 11120391 is about 223.2064220413.

It can be divided in two parts, 11120 and 391, that added together give a palindrome (11511).

The spelling of 11120391 in words is "eleven million, one hundred twenty thousand, three hundred ninety-one".