12620647 has 8 divisors (see below), whose sum is σ = 14391216. Its totient is φ = 10964352.

The previous prime is 12620633. The next prime is 12620653. The reversal of 12620647 is 74602621.

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 12620647 - 2¹⁵ = 12587879 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 (12620677) 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, 28333 + ... + 28774.

It is an arithmetic number, because the mean of its divisors is an integer number (1798902).

Almost surely, 2^12620647 is an apocalyptic number.

12620647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12620647 is a deficient number, since it is larger than the sum of its proper divisors (1770569).

12620647 is a wasteful number, since it uses less digits than its factorization.

12620647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57137.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 12620647 is about 3552.5549960557. The cubic root of 12620647 is about 232.8237106473.

It can be divided in two parts, 126206 and 47, that added together give a triangular number (126253 = T₅₀₂).

The spelling of 12620647 in words is "twelve million, six hundred twenty thousand, six hundred forty-seven".