12154554 has 12 divisors (see below), whose sum is σ = 26334906. Its totient is φ = 4051512.

The previous prime is 12154553. The next prime is 12154559. The reversal of 12154554 is 45545121.

It can be written as a sum of positive squares in only one way, i.e., 12089529 + 65025 = 3477^2 + 255^2 .

It is not an unprimeable number, because it can be changed into a prime (12154553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 337609 + ... + 337644.

Almost surely, 2^12154554 is an apocalyptic number.

12154554 is an abundant number, since it is smaller than the sum of its proper divisors (14180352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12154554 is a wasteful number, since it uses less digits than its factorization.

12154554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675261 (or 675258 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 12154554 is about 3486.3381935779. The cubic root of 12154554 is about 229.9215485431.

Adding to 12154554 its reverse (45545121), we get a palindrome (57699675).

The spelling of 12154554 in words is "twelve million, one hundred fifty-four thousand, five hundred fifty-four".