12660945 has 16 divisors (see below), whose sum is σ = 22099392. Its totient is φ = 6138560.

The previous prime is 12660941. The next prime is 12660953. The reversal of 12660945 is 54906621.

It is not a de Polignac number, because 12660945 - 2² = 12660941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12660941) 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, 38202 + ... + 38531.

It is an arithmetic number, because the mean of its divisors is an integer number (1381212).

Almost surely, 2^12660945 is an apocalyptic number.

12660945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12660945 is a deficient number, since it is larger than the sum of its proper divisors (9438447).

12660945 is a wasteful number, since it uses less digits than its factorization.

12660945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76752.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 12660945 is about 3558.2221684431. Note that the first 3 decimals coincide. The cubic root of 12660945 is about 233.0712510884.

The spelling of 12660945 in words is "twelve million, six hundred sixty thousand, nine hundred forty-five".