12153257 has 4 divisors (see below), whose sum is σ = 12170880. Its totient is φ = 12135636.

The previous prime is 12153247. The next prime is 12153299. The reversal of 12153257 is 75235121.

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: 75235121 = 13 ⋅5787317.

It is a cyclic number.

It is not a de Polignac number, because 12153257 - 2¹⁰ = 12152233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12153247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (3042720).

Almost surely, 2^12153257 is an apocalyptic number.

It is an amenable number.

12153257 is a deficient number, since it is larger than the sum of its proper divisors (17623).

12153257 is an equidigital number, since it uses as much as digits as its factorization.

12153257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17622.

The product of its digits is 2100, while the sum is 26.

The square root of 12153257 is about 3486.1521768276. The cubic root of 12153257 is about 229.9133700212.

Adding to 12153257 its reverse (75235121), we get a palindrome (87388378).

The spelling of 12153257 in words is "twelve million, one hundred fifty-three thousand, two hundred fifty-seven".