12641279 has 4 divisors (see below), whose sum is σ = 14447184. Its totient is φ = 10835376.

The previous prime is 12641263. The next prime is 12641297. The reversal of 12641279 is 97214621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12641279 - 2⁴ = 12641263 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902942 + ... + 902955.

It is an arithmetic number, because the mean of its divisors is an integer number (3611796).

Almost surely, 2^12641279 is an apocalyptic number.

12641279 is a deficient number, since it is larger than the sum of its proper divisors (1805905).

12641279 is an equidigital number, since it uses as much as digits as its factorization.

12641279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805904.

The product of its digits is 6048, while the sum is 32.

The square root of 12641279 is about 3555.4576358044. The cubic root of 12641279 is about 232.9505135376.

The spelling of 12641279 in words is "twelve million, six hundred forty-one thousand, two hundred seventy-nine".