12109154 has 8 divisors (see below), whose sum is σ = 18180288. Its totient is φ = 6049060.

The previous prime is 12109147. The next prime is 12109157. The reversal of 12109154 is 45190121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12109154² = 293263221191432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12109157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (2272536).

Almost surely, 2^12109154 is an apocalyptic number.

12109154 is a deficient number, since it is larger than the sum of its proper divisors (6071134).

12109154 is a wasteful number, since it uses less digits than its factorization.

12109154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 12109154 is about 3479.8209724065. The cubic root of 12109154 is about 229.6349217643.

Adding to 12109154 its reverse (45190121), we get a palindrome (57299275).

The spelling of 12109154 in words is "twelve million, one hundred nine thousand, one hundred fifty-four".