12421105 has 8 divisors (see below), whose sum is σ = 15014952. Its totient is φ = 9863808.

The previous prime is 12421103. The next prime is 12421121. The reversal of 12421105 is 50112421.

It can be written as a sum of positive squares in 4 ways, for example, as 1238769 + 11182336 = 1113^2 + 3344^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12421105 - 2¹ = 12421103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8382 + ... + 9751.

It is an arithmetic number, because the mean of its divisors is an integer number (1876869).

Almost surely, 2^12421105 is an apocalyptic number.

It is an amenable number.

12421105 is a deficient number, since it is larger than the sum of its proper divisors (2593847).

12421105 is a wasteful number, since it uses less digits than its factorization.

12421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18275.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12421105 is about 3524.3588069321. The cubic root of 12421105 is about 231.5901466193.

Adding to 12421105 its reverse (50112421), we get a palindrome (62533526).

The spelling of 12421105 in words is "twelve million, four hundred twenty-one thousand, one hundred five".