12660105 has 16 divisors (see below), whose sum is σ = 20804544. Its totient is φ = 6569280.

The previous prime is 12660101. The next prime is 12660107. The reversal of 12660105 is 50106621.

It is a happy number.

It is not a de Polignac number, because 12660105 - 2² = 12660101 is a prime.

It is a super-2 number, since 2×12660105² = 320556517222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12660101) 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, 10851 + ... + 11960.

It is an arithmetic number, because the mean of its divisors is an integer number (1300284).

Almost surely, 2^12660105 is an apocalyptic number.

12660105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12660105 is a deficient number, since it is larger than the sum of its proper divisors (8144439).

12660105 is a wasteful number, since it uses less digits than its factorization.

12660105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22856.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 12660105 is about 3558.1041300108. The cubic root of 12660105 is about 233.0660965447.

Adding to 12660105 its reverse (50106621), we get a palindrome (62766726).

The spelling of 12660105 in words is "twelve million, six hundred sixty thousand, one hundred five".