12045155 has 4 divisors (see below), whose sum is σ = 14454192. Its totient is φ = 9636120.

The previous prime is 12045139. The next prime is 12045167. The reversal of 12045155 is 55154021.

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: 55154021 = 13 ⋅4242617.

It is not a de Polignac number, because 12045155 - 2⁴ = 12045139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12045155.

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, 1204511 + ... + 1204520.

It is an arithmetic number, because the mean of its divisors is an integer number (3613548).

Almost surely, 2^12045155 is an apocalyptic number.

12045155 is a deficient number, since it is larger than the sum of its proper divisors (2409037).

12045155 is an equidigital number, since it uses as much as digits as its factorization.

12045155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409036.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 12045155 is about 3470.6130582363. The cubic root of 12045155 is about 229.2296533568.

Adding to 12045155 its reverse (55154021), we get a palindrome (67199176).

The spelling of 12045155 in words is "twelve million, forty-five thousand, one hundred fifty-five".