11811755 has 4 divisors (see below), whose sum is σ = 14174112. Its totient is φ = 9449400.

The previous prime is 11811721. The next prime is 11811763. The reversal of 11811755 is 55711811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55711811 = 131 ⋅425281.

It is not a de Polignac number, because 11811755 - 2¹⁰ = 11810731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181171 + ... + 1181180.

It is an arithmetic number, because the mean of its divisors is an integer number (3543528).

Almost surely, 2^11811755 is an apocalyptic number.

11811755 is a deficient number, since it is larger than the sum of its proper divisors (2362357).

11811755 is an equidigital number, since it uses as much as digits as its factorization.

11811755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362356.

The product of its digits is 1400, while the sum is 29.

The square root of 11811755 is about 3436.8233879558. The cubic root of 11811755 is about 227.7393849407.

The spelling of 11811755 in words is "eleven million, eight hundred eleven thousand, seven hundred fifty-five".