11961255 has 8 divisors (see below), whose sum is σ = 19138032. Its totient is φ = 6379328.

The previous prime is 11961223. The next prime is 11961259. The reversal of 11961255 is 55216911.

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 11961255 - 2⁵ = 11961223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11961259) 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 7 ways as a sum of consecutive naturals, for example, 398694 + ... + 398723.

It is an arithmetic number, because the mean of its divisors is an integer number (2392254).

Almost surely, 2^11961255 is an apocalyptic number.

11961255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11961255 is a deficient number, since it is larger than the sum of its proper divisors (7176777).

11961255 is an equidigital number, since it uses as much as digits as its factorization.

11961255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797425.

The product of its digits is 2700, while the sum is 30.

The square root of 11961255 is about 3458.5047347083. The cubic root of 11961255 is about 228.6961831055.

The spelling of 11961255 in words is "eleven million, nine hundred sixty-one thousand, two hundred fifty-five".