11955855 has 8 divisors (see below), whose sum is σ = 19129392. Its totient is φ = 6376448.

The previous prime is 11955851. The next prime is 11955869. The reversal of 11955855 is 55855911.

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

It is a cyclic number.

It is not a de Polignac number, because 11955855 - 2² = 11955851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11955851) 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, 398514 + ... + 398543.

It is an arithmetic number, because the mean of its divisors is an integer number (2391174).

Almost surely, 2^11955855 is an apocalyptic number.

11955855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11955855 is a deficient number, since it is larger than the sum of its proper divisors (7173537).

11955855 is an equidigital number, since it uses as much as digits as its factorization.

11955855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797065.

The product of its digits is 45000, while the sum is 39.

The square root of 11955855 is about 3457.7239623776. The cubic root of 11955855 is about 228.6617623785.

The spelling of 11955855 in words is "eleven million, nine hundred fifty-five thousand, eight hundred fifty-five".