12347621 has 16 divisors (see below), whose sum is σ = 14703360. Its totient is φ = 10221120.

The previous prime is 12347617. The next prime is 12347651. The reversal of 12347621 is 12674321.

It is not a de Polignac number, because 12347621 - 2² = 12347617 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 (12347611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10751 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (918960).

Almost surely, 2^12347621 is an apocalyptic number.

12347621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12347621 is a deficient number, since it is larger than the sum of its proper divisors (2355739).

12347621 is a wasteful number, since it uses less digits than its factorization.

12347621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196.

The product of its digits is 2016, while the sum is 26.

The square root of 12347621 is about 3513.9181834528. The cubic root of 12347621 is about 231.1325426395.

The spelling of 12347621 in words is "twelve million, three hundred forty-seven thousand, six hundred twenty-one".