12551117 has 4 divisors (see below), whose sum is σ = 13289436. Its totient is φ = 11812800.

The previous prime is 12551111. The next prime is 12551131. The reversal of 12551117 is 71115521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8145316 + 4405801 = 2854^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551117 - 2⁴ = 12551101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12551092 and 12551101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369134 + ... + 369167.

It is an arithmetic number, because the mean of its divisors is an integer number (3322359).

Almost surely, 2^12551117 is an apocalyptic number.

12551117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12551117 is a deficient number, since it is larger than the sum of its proper divisors (738319).

12551117 is an equidigital number, since it uses as much as digits as its factorization.

12551117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738318.

The product of its digits is 350, while the sum is 23.

The square root of 12551117 is about 3542.7555659402. The cubic root of 12551117 is about 232.3953635603.

Adding to 12551117 its reverse (71115521), we get a palindrome (83666638).

The spelling of 12551117 in words is "twelve million, five hundred fifty-one thousand, one hundred seventeen".