12660402 has 16 divisors (see below), whose sum is σ = 25451712. Its totient is φ = 4198320.

The previous prime is 12660377. The next prime is 12660409. The reversal of 12660402 is 20406621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12660409) 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 7 ways as a sum of consecutive naturals, for example, 4174 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (1590732).

Almost surely, 2^12660402 is an apocalyptic number.

12660402 is an abundant number, since it is smaller than the sum of its proper divisors (12791310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12660402 is a wasteful number, since it uses less digits than its factorization.

12660402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10913.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12660402 is about 3558.1458654754. The cubic root of 12660402 is about 233.0679190702.

The spelling of 12660402 in words is "twelve million, six hundred sixty thousand, four hundred two".