12354638 has 16 divisors (see below), whose sum is σ = 19262880. Its totient is φ = 5935776.

The previous prime is 12354637. The next prime is 12354673. The reversal of 12354638 is 83645321.

It is a super-2 number, since 2×12354638² = 305274160222088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12354637) 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 7 ways as a sum of consecutive naturals, for example, 16631 + ... + 17357.

It is an arithmetic number, because the mean of its divisors is an integer number (1203930).

Almost surely, 2^12354638 is an apocalyptic number.

12354638 is a deficient number, since it is larger than the sum of its proper divisors (6908242).

12354638 is a wasteful number, since it uses less digits than its factorization.

12354638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 17280, while the sum is 32.

The square root of 12354638 is about 3514.9164997194. The cubic root of 12354638 is about 231.1763176015.

Adding to 12354638 its reverse (83645321), we get a palindrome (95999959).

The spelling of 12354638 in words is "twelve million, three hundred fifty-four thousand, six hundred thirty-eight".