12355257 has 4 divisors (see below), whose sum is σ = 16473680. Its totient is φ = 8236836.

The previous prime is 12355253. The next prime is 12355271. The reversal of 12355257 is 75255321.

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.

It is not a de Polignac number, because 12355257 - 2² = 12355253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12355253) 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, 2059207 + ... + 2059212.

It is an arithmetic number, because the mean of its divisors is an integer number (4118420).

Almost surely, 2^12355257 is an apocalyptic number.

It is an amenable number.

12355257 is a deficient number, since it is larger than the sum of its proper divisors (4118423).

12355257 is an equidigital number, since it uses as much as digits as its factorization.

12355257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118422.

The product of its digits is 10500, while the sum is 30.

The square root of 12355257 is about 3515.0045519174. The cubic root of 12355257 is about 231.1801783851.

The spelling of 12355257 in words is "twelve million, three hundred fifty-five thousand, two hundred fifty-seven".