12661747 has 6 divisors (see below), whose sum is σ = 14729028. Its totient is φ = 10852884.

The previous prime is 12661741. The next prime is 12661769. The reversal of 12661747 is 74716621.

It is a happy number.

It is not a de Polignac number, because 12661747 - 2³ = 12661739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12661741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129153 + ... + 129250.

It is an arithmetic number, because the mean of its divisors is an integer number (2454838).

Almost surely, 2^12661747 is an apocalyptic number.

12661747 is a deficient number, since it is larger than the sum of its proper divisors (2067281).

12661747 is an equidigital number, since it uses as much as digits as its factorization.

12661747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258417 (or 258410 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 12661747 is about 3558.3348633876. The cubic root of 12661747 is about 233.0761722376.

The spelling of 12661747 in words is "twelve million, six hundred sixty-one thousand, seven hundred forty-seven".