12774639 has 8 divisors (see below), whose sum is σ = 17061552. Its totient is φ = 8502080.

The previous prime is 12774617. The next prime is 12774649. The reversal of 12774639 is 93647721.

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 12774639 - 2⁵ = 12774607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12774597 and 12774606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12774649) 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, 1302 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (2132694).

Almost surely, 2^12774639 is an apocalyptic number.

12774639 is a deficient number, since it is larger than the sum of its proper divisors (4286913).

12774639 is an equidigital number, since it uses as much as digits as its factorization.

12774639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7177.

The product of its digits is 63504, while the sum is 39.

The square root of 12774639 is about 3574.1626991507. The cubic root of 12774639 is about 233.7668252161.

The spelling of 12774639 in words is "twelve million, seven hundred seventy-four thousand, six hundred thirty-nine".