11881755 has 32 divisors (see below), whose sum is σ = 21265920. Its totient is φ = 6294240.

The previous prime is 11881747. The next prime is 11881757. The reversal of 11881755 is 55718811.

It is a happy number.

It is not a de Polignac number, because 11881755 - 2³ = 11881747 is a prime.

It is a super-2 number, since 2×11881755² = 282352203760050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11881757) 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 31 ways as a sum of consecutive naturals, for example, 38050 + ... + 38360.

It is an arithmetic number, because the mean of its divisors is an integer number (664560).

Almost surely, 2^11881755 is an apocalyptic number.

11881755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11881755 is a deficient number, since it is larger than the sum of its proper divisors (9384165).

11881755 is a wasteful number, since it uses less digits than its factorization.

11881755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 602 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The square root of 11881755 is about 3446.9921670929. The cubic root of 11881755 is about 228.1883830883.

The spelling of 11881755 in words is "eleven million, eight hundred eighty-one thousand, seven hundred fifty-five".