12421583 has 4 divisors (see below), whose sum is σ = 12685920. Its totient is φ = 12157248.

The previous prime is 12421579. The next prime is 12421589. The reversal of 12421583 is 38512421.

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 12421583 - 2² = 12421579 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132098 + ... + 132191.

It is an arithmetic number, because the mean of its divisors is an integer number (3171480).

Almost surely, 2^12421583 is an apocalyptic number.

12421583 is a deficient number, since it is larger than the sum of its proper divisors (264337).

12421583 is an equidigital number, since it uses as much as digits as its factorization.

12421583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264336.

The product of its digits is 1920, while the sum is 26.

The square root of 12421583 is about 3524.4266200334. The cubic root of 12421583 is about 231.5931173338.

The spelling of 12421583 in words is "twelve million, four hundred twenty-one thousand, five hundred eighty-three".