12045117 has 16 divisors (see below), whose sum is σ = 18782720. Its totient is φ = 6722352.

The previous prime is 12045083. The next prime is 12045133. The reversal of 12045117 is 71154021.

It is a happy number.

It is not a de Polignac number, because 12045117 - 2⁶ = 12045053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12045093 and 12045102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5767 + ... + 7572.

It is an arithmetic number, because the mean of its divisors is an integer number (1173920).

Almost surely, 2^12045117 is an apocalyptic number.

It is an amenable number.

12045117 is a deficient number, since it is larger than the sum of its proper divisors (6737603).

12045117 is a wasteful number, since it uses less digits than its factorization.

12045117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13392.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 12045117 is about 3470.6075836948. The cubic root of 12045117 is about 229.2294122990.

Adding to 12045117 its reverse (71154021), we get a palindrome (83199138).

The spelling of 12045117 in words is "twelve million, forty-five thousand, one hundred seventeen".