11782155 has 48 divisors (see below), whose sum is σ = 23738112. Its totient is φ = 4848000.

The previous prime is 11782153. The next prime is 11782157. The reversal of 11782155 is 55128711.

It is an interprime number because it is at equal distance from previous prime (11782153) and next prime (11782157).

It is not a de Polignac number, because 11782155 - 2¹ = 11782153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11782153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116605 + ... + 116705.

It is an arithmetic number, because the mean of its divisors is an integer number (494544).

Almost surely, 2^11782155 is an apocalyptic number.

11782155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11782155 is an abundant number, since it is smaller than the sum of its proper divisors (11955957).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11782155 is a wasteful number, since it uses less digits than its factorization.

11782155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 127 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 11782155 is about 3432.5143845292. The cubic root of 11782155 is about 227.5489891683.

It can be divided in two parts, 1178 and 2155, that added together give a palindrome (3333).

The spelling of 11782155 in words is "eleven million, seven hundred eighty-two thousand, one hundred fifty-five".