12398305 has 4 divisors (see below), whose sum is σ = 14877972. Its totient is φ = 9918640.

The previous prime is 12398303. The next prime is 12398327. The reversal of 12398305 is 50389321.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2588881 + 9809424 = 1609^2 + 3132^2 .

It is not a de Polignac number, because 12398305 - 2¹ = 12398303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12398303) 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, 1239826 + ... + 1239835.

It is an arithmetic number, because the mean of its divisors is an integer number (3719493).

Almost surely, 2^12398305 is an apocalyptic number.

It is an amenable number.

12398305 is a deficient number, since it is larger than the sum of its proper divisors (2479667).

12398305 is an equidigital number, since it uses as much as digits as its factorization.

12398305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479666.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 12398305 is about 3521.1226902793. The cubic root of 12398305 is about 231.4483586590.

The spelling of 12398305 in words is "twelve million, three hundred ninety-eight thousand, three hundred five".