12641447 has 8 divisors (see below), whose sum is σ = 15558816. Its totient is φ = 10001952.

The previous prime is 12641443. The next prime is 12641509. The reversal of 12641447 is 74414621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12641447 - 2² = 12641443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641443) 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, 69368 + ... + 69549.

It is an arithmetic number, because the mean of its divisors is an integer number (1944852).

Almost surely, 2^12641447 is an apocalyptic number.

12641447 is a deficient number, since it is larger than the sum of its proper divisors (2917369).

12641447 is a wasteful number, since it uses less digits than its factorization.

12641447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138937.

The product of its digits is 5376, while the sum is 29.

The square root of 12641447 is about 3555.4812613766. The cubic root of 12641447 is about 232.9515454879.

The spelling of 12641447 in words is "twelve million, six hundred forty-one thousand, four hundred forty-seven".