12017755 has 4 divisors (see below), whose sum is σ = 14421312. Its totient is φ = 9614200.

The previous prime is 12017749. The next prime is 12017773. The reversal of 12017755 is 55771021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55771021 = 23 ⋅2424827.

It is not a de Polignac number, because 12017755 - 2⁷ = 12017627 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 3 ways as a sum of consecutive naturals, for example, 1201771 + ... + 1201780.

It is an arithmetic number, because the mean of its divisors is an integer number (3605328).

Almost surely, 2^12017755 is an apocalyptic number.

12017755 is a deficient number, since it is larger than the sum of its proper divisors (2403557).

12017755 is an equidigital number, since it uses as much as digits as its factorization.

12017755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403556.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 12017755 is about 3466.6633814087. The cubic root of 12017755 is about 229.0557062091.

Adding to 12017755 its reverse (55771021), we get a palindrome (67788776).

The spelling of 12017755 in words is "twelve million, seventeen thousand, seven hundred fifty-five".