12644071 has 8 divisors (see below), whose sum is σ = 13878144. Its totient is φ = 11424120.

The previous prime is 12644059. The next prime is 12644077. The reversal of 12644071 is 17044621.

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 12644071 - 2¹⁵ = 12611303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 5278.

It is an arithmetic number, because the mean of its divisors is an integer number (1734768).

Almost surely, 2^12644071 is an apocalyptic number.

12644071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12644071 is a deficient number, since it is larger than the sum of its proper divisors (1234073).

12644071 is a wasteful number, since it uses less digits than its factorization.

12644071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 12644071 is about 3555.8502499402. The cubic root of 12644071 is about 232.9676623814.

Adding to 12644071 its reverse (17044621), we get a palindrome (29688692).

It can be divided in two parts, 1264 and 4071, that added together give a palindrome (5335).

The spelling of 12644071 in words is "twelve million, six hundred forty-four thousand, seventy-one".