12154055 has 4 divisors (see below), whose sum is σ = 14584872. Its totient is φ = 9723240.

The previous prime is 12154039. The next prime is 12154057. The reversal of 12154055 is 55045121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12154055 - 2⁴ = 12154039 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 12154055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12154057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215401 + ... + 1215410.

It is an arithmetic number, because the mean of its divisors is an integer number (3646218).

Almost surely, 2^12154055 is an apocalyptic number.

12154055 is a deficient number, since it is larger than the sum of its proper divisors (2430817).

12154055 is an equidigital number, since it uses as much as digits as its factorization.

12154055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430816.

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

The square root of 12154055 is about 3486.2666277839. The cubic root of 12154055 is about 229.9184020565.

Adding to 12154055 its reverse (55045121), we get a palindrome (67199176).

The spelling of 12154055 in words is "twelve million, one hundred fifty-four thousand, fifty-five".