12257617 has 4 divisors (see below), whose sum is σ = 12653056. Its totient is φ = 11862180.

The previous prime is 12257611. The next prime is 12257621. The reversal of 12257617 is 71675221.

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: 71675221 = 1021 ⋅70201.

It is a cyclic number.

It is not a de Polignac number, because 12257617 - 2²³ = 3869009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 395407 = 12257617 / (1 + 2 + 2 + 5 + 7 + 6 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12257611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197673 + ... + 197734.

It is an arithmetic number, because the mean of its divisors is an integer number (3163264).

Almost surely, 2^12257617 is an apocalyptic number.

It is an amenable number.

12257617 is a deficient number, since it is larger than the sum of its proper divisors (395439).

12257617 is an equidigital number, since it uses as much as digits as its factorization.

12257617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395438.

The product of its digits is 5880, while the sum is 31.

The square root of 12257617 is about 3501.0879737590. The cubic root of 12257617 is about 230.5695838778.

The spelling of 12257617 in words is "twelve million, two hundred fifty-seven thousand, six hundred seventeen".