12621117 has 4 divisors (see below), whose sum is σ = 16828160. Its totient is φ = 8414076.

The previous prime is 12621113. The next prime is 12621121. The reversal of 12621117 is 71112621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71112621 = 3 ⋅23704207.

It is an interprime number because it is at equal distance from previous prime (12621113) and next prime (12621121).

It is not a de Polignac number, because 12621117 - 2² = 12621113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12621093 and 12621102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621113) 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 3 ways as a sum of consecutive naturals, for example, 2103517 + ... + 2103522.

It is an arithmetic number, because the mean of its divisors is an integer number (4207040).

Almost surely, 2^12621117 is an apocalyptic number.

It is an amenable number.

12621117 is a deficient number, since it is larger than the sum of its proper divisors (4207043).

12621117 is an equidigital number, since it uses as much as digits as its factorization.

12621117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207042.

The product of its digits is 168, while the sum is 21.

The square root of 12621117 is about 3552.6211450139. The cubic root of 12621117 is about 232.8266007735.

Adding to 12621117 its reverse (71112621), we get a palindrome (83733738).

The spelling of 12621117 in words is "twelve million, six hundred twenty-one thousand, one hundred seventeen".