12409618 has 8 divisors (see below), whose sum is σ = 20046348. Its totient is φ = 5727504.

The previous prime is 12409613. The next prime is 12409619. The reversal of 12409618 is 81690421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9966649 + 2442969 = 3157^2 + 1563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12409618.

It is not an unprimeable number, because it can be changed into a prime (12409613) 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, 238621 + ... + 238672.

Almost surely, 2^12409618 is an apocalyptic number.

12409618 is a deficient number, since it is larger than the sum of its proper divisors (7636730).

12409618 is a wasteful number, since it uses less digits than its factorization.

12409618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477308.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12409618 is about 3522.7287718472. The cubic root of 12409618 is about 231.5187333135.

The spelling of 12409618 in words is "twelve million, four hundred nine thousand, six hundred eighteen".