12665541 has 16 divisors (see below), whose sum is σ = 19443200. Its totient is φ = 7183728.

The previous prime is 12665531. The next prime is 12665557. The reversal of 12665541 is 14556621.

It is not a de Polignac number, because 12665541 - 2⁵ = 12665509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12665499 and 12665508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750 + ... + 5088.

It is an arithmetic number, because the mean of its divisors is an integer number (1215200).

Almost surely, 2^12665541 is an apocalyptic number.

It is an amenable number.

12665541 is a deficient number, since it is larger than the sum of its proper divisors (6777659).

12665541 is a wasteful number, since it uses less digits than its factorization.

12665541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488.

The product of its digits is 7200, while the sum is 30.

The square root of 12665541 is about 3558.8679379825. The cubic root of 12665541 is about 233.0994497702.

The spelling of 12665541 in words is "twelve million, six hundred sixty-five thousand, five hundred forty-one".