12045917 has 8 divisors (see below), whose sum is σ = 13093080. Its totient is φ = 11016000.

The previous prime is 12045907. The next prime is 12045937. The reversal of 12045917 is 71954021.

It can be written as a sum of positive squares in 4 ways, for example, as 32761 + 12013156 = 181^2 + 3466^2 .

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 12045917 - 2⁸ = 12045661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12045917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834 + ... + 5667.

It is an arithmetic number, because the mean of its divisors is an integer number (1636635).

Almost surely, 2^12045917 is an apocalyptic number.

12045917 is the 2834-th pentagonal number.

It is an amenable number.

12045917 is a deficient number, since it is larger than the sum of its proper divisors (1047163).

12045917 is a wasteful number, since it uses less digits than its factorization.

12045917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8623.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 12045917 is about 3470.7228353759. The cubic root of 12045917 is about 229.2344870932.

Adding to 12045917 its reverse (71954021), we get a palindrome (83999938).

The spelling of 12045917 in words is "twelve million, forty-five thousand, nine hundred seventeen".