12421097 has 4 divisors (see below), whose sum is σ = 13376580.
Its totient is φ = 11465616.
The previous prime is 12421061. The next prime is 12421099. The reversal of 12421097 is 79012421.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 5125696 + 7295401 = 2264^2 + 2701^2
It is a cyclic number.
It is not a de Polignac number, because 12421097 - 28 = 12420841 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (12421099) 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, 477722 + ... + 477747.
It is an arithmetic number, because the mean of its divisors is an integer number (3344145).
Almost surely, 212421097 is an apocalyptic number.
It is an amenable number.
12421097 is a deficient number, since it is larger than the sum of its proper divisors (955483).
12421097 is an equidigital number, since it uses as much as digits as its factorization.
12421097 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 955482.
The product of its (nonzero) digits is 1008, while the sum is 26.
The square root of 12421097 is about 3524.3576719737.
The cubic root of 12421097 is about 231.5900968996.
The spelling of 12421097 in words is "twelve million, four hundred twenty-one thousand, ninety-seven".