11273391 has 16 divisors (see below), whose sum is σ = 16780800. Its totient is φ = 7479864.

The previous prime is 11273389. The next prime is 11273399. The reversal of 11273391 is 19337211.

11273391 is a `hidden beast` number, since 1 + 1 + 273 + 391 = 666.

It is not a de Polignac number, because 11273391 - 2¹ = 11273389 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 (11273399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5580 + ... + 7326.

It is an arithmetic number, because the mean of its divisors is an integer number (1048800).

Almost surely, 2^11273391 is an apocalyptic number.

11273391 is a deficient number, since it is larger than the sum of its proper divisors (5507409).

11273391 is a wasteful number, since it uses less digits than its factorization.

11273391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1989 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 11273391 is about 3357.5870800323. The cubic root of 11273391 is about 224.2254254343.

It can be divided in two parts, 11273 and 391, that added together give a square (11664 = 108²).

The spelling of 11273391 in words is "eleven million, two hundred seventy-three thousand, three hundred ninety-one".