12109544 has 8 divisors (see below), whose sum is σ = 22705410. Its totient is φ = 6054768.

The previous prime is 12109543. The next prime is 12109553. The reversal of 12109544 is 44590121.

12109544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 68644 = 3470^2 + 262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12109543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756839 + ... + 756854.

Almost surely, 2^12109544 is an apocalyptic number.

It is an amenable number.

12109544 is a deficient number, since it is larger than the sum of its proper divisors (10595866).

12109544 is a wasteful number, since it uses less digits than its factorization.

12109544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513699 (or 1513695 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 12109544 is about 3479.8770093209. The cubic root of 12109544 is about 229.6373870248.

Adding to 12109544 its reverse (44590121), we get a palindrome (56699665).

The spelling of 12109544 in words is "twelve million, one hundred nine thousand, five hundred forty-four".