12421145 has 8 divisors (see below), whose sum is σ = 16260480. Its totient is φ = 9033520.

The previous prime is 12421121. The next prime is 12421163. The reversal of 12421145 is 54112421.

It is a happy number.

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

It is not a de Polignac number, because 12421145 - 2¹⁴ = 12404761 is a prime.

It is a super-2 number, since 2×12421145² = 308569686222050, which contains 22 as substring.

It is an unprimeable number.

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, 112865 + ... + 112974.

It is an arithmetic number, because the mean of its divisors is an integer number (2032560).

Almost surely, 2^12421145 is an apocalyptic number.

It is an amenable number.

12421145 is a deficient number, since it is larger than the sum of its proper divisors (3839335).

12421145 is a wasteful number, since it uses less digits than its factorization.

12421145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225855.

The product of its digits is 320, while the sum is 20.

The square root of 12421145 is about 3524.3644817187. The cubic root of 12421145 is about 231.5903952176.

Adding to 12421145 its reverse (54112421), we get a palindrome (66533566).

The spelling of 12421145 in words is "twelve million, four hundred twenty-one thousand, one hundred forty-five".