12153817 has 4 divisors (see below), whose sum is σ = 13088740. Its totient is φ = 11218896.

The previous prime is 12153803. The next prime is 12153847. The reversal of 12153817 is 71835121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71835121 = 281 ⋅255641.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 8826841 = 1824^2 + 2971^2 .

It is not a de Polignac number, because 12153817 - 2¹⁹ = 11629529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12153847) 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, 467442 + ... + 467467.

It is an arithmetic number, because the mean of its divisors is an integer number (3272185).

Almost surely, 2^12153817 is an apocalyptic number.

It is an amenable number.

12153817 is a deficient number, since it is larger than the sum of its proper divisors (934923).

12153817 is an equidigital number, since it uses as much as digits as its factorization.

12153817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934922.

The product of its digits is 1680, while the sum is 28.

The square root of 12153817 is about 3486.2324936814. The cubic root of 12153817 is about 229.9169012971.

Adding to 12153817 its reverse (71835121), we get a palindrome (83988938).

The spelling of 12153817 in words is "twelve million, one hundred fifty-three thousand, eight hundred seventeen".