12257305 has 4 divisors (see below), whose sum is σ = 14708772. Its totient is φ = 9805840.

The previous prime is 12257293. The next prime is 12257317. The reversal of 12257305 is 50375221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12257293) and next prime (12257317).

It can be written as a sum of positive squares in 2 ways, for example, as 6245001 + 6012304 = 2499^2 + 2452^2 .

It is not a de Polignac number, because 12257305 - 2¹³ = 12249113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12257305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225726 + ... + 1225735.

It is an arithmetic number, because the mean of its divisors is an integer number (3677193).

Almost surely, 2^12257305 is an apocalyptic number.

It is an amenable number.

12257305 is a deficient number, since it is larger than the sum of its proper divisors (2451467).

12257305 is an equidigital number, since it uses as much as digits as its factorization.

12257305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451466.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 12257305 is about 3501.0434158976. The cubic root of 12257305 is about 230.5676275889.

The spelling of 12257305 in words is "twelve million, two hundred fifty-seven thousand, three hundred five".