11139855 has 8 divisors (see below), whose sum is σ = 17823792. Its totient is φ = 5941248.

The previous prime is 11139853. The next prime is 11139859. The reversal of 11139855 is 55893111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11139855 - 2¹ = 11139853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11139851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371314 + ... + 371343.

It is an arithmetic number, because the mean of its divisors is an integer number (2227974).

Almost surely, 2^11139855 is an apocalyptic number.

11139855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11139855 is a deficient number, since it is larger than the sum of its proper divisors (6683937).

11139855 is an equidigital number, since it uses as much as digits as its factorization.

11139855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742665.

The product of its digits is 5400, while the sum is 33.

The square root of 11139855 is about 3337.6421318050. The cubic root of 11139855 is about 223.3365720676.

The spelling of 11139855 in words is "eleven million, one hundred thirty-nine thousand, eight hundred fifty-five".