12243619 has 4 divisors (see below), whose sum is σ = 12888040. Its totient is φ = 11599200.

The previous prime is 12243611. The next prime is 12243661. The reversal of 12243619 is 91634221.

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

It is a cyclic number.

It is not a de Polignac number, because 12243619 - 2³ = 12243611 is a prime.

It is a super-2 number, since 2×12243619² = 299812412434322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12243611) 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, 322182 + ... + 322219.

It is an arithmetic number, because the mean of its divisors is an integer number (3222010).

Almost surely, 2^12243619 is an apocalyptic number.

12243619 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12243619 is a deficient number, since it is larger than the sum of its proper divisors (644421).

12243619 is an equidigital number, since it uses as much as digits as its factorization.

12243619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644420.

The product of its digits is 2592, while the sum is 28.

The square root of 12243619 is about 3499.0883098316. The cubic root of 12243619 is about 230.4817815368.

The spelling of 12243619 in words is "twelve million, two hundred forty-three thousand, six hundred nineteen".