11801055 has 32 divisors (see below), whose sum is σ = 21740544. Its totient is φ = 5354496.

The previous prime is 11801017. The next prime is 11801059. The reversal of 11801055 is 55010811.

It is not a de Polignac number, because 11801055 - 2⁶ = 11800991 is a prime.

It is a super-2 number, since 2×11801055² = 278529798226050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801059) 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, 17199 + ... + 17871.

It is an arithmetic number, because the mean of its divisors is an integer number (679392).

Almost surely, 2^11801055 is an apocalyptic number.

11801055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11801055 is a deficient number, since it is larger than the sum of its proper divisors (9939489).

11801055 is a wasteful number, since it uses less digits than its factorization.

11801055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 11801055 is about 3435.2663652183. The cubic root of 11801055 is about 227.6705961901.

Adding to 11801055 its reverse (55010811), we get a palindrome (66811866).

The spelling of 11801055 in words is "eleven million, eight hundred one thousand, fifty-five".