11951155 has 8 divisors (see below), whose sum is σ = 14365152. Its totient is φ = 9545088.

The previous prime is 11951143. The next prime is 11951167. The reversal of 11951155 is 55115911.

It is an interprime number because it is at equal distance from previous prime (11951143) and next prime (11951167).

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 11951155 - 2⁵ = 11951123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2107 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (1795644).

Almost surely, 2^11951155 is an apocalyptic number.

11951155 is a deficient number, since it is larger than the sum of its proper divisors (2413997).

11951155 is an equidigital number, since it uses as much as digits as its factorization.

11951155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965.

The product of its digits is 1125, while the sum is 28.

The square root of 11951155 is about 3457.0442577439. The cubic root of 11951155 is about 228.6317951605.

The spelling of 11951155 in words is "eleven million, nine hundred fifty-one thousand, one hundred fifty-five".