12002421 has 8 divisors (see below), whose sum is σ = 16265824. Its totient is φ = 7870320.

The previous prime is 12002413. The next prime is 12002443. The reversal of 12002421 is 12420021.

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

It is not a de Polignac number, because 12002421 - 2³ = 12002413 is a prime.

It is a super-2 number, since 2×12002421² = 288116219722482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002397 and 12002406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32611 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (2033228).

Almost surely, 2^12002421 is an apocalyptic number.

It is an amenable number.

12002421 is a deficient number, since it is larger than the sum of its proper divisors (4263403).

12002421 is an equidigital number, since it uses as much as digits as its factorization.

12002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65651.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12002421 is about 3464.4510387650. The cubic root of 12002421 is about 228.9582438819.

Adding to 12002421 its reverse (12420021), we get a palindrome (24422442).

The spelling of 12002421 in words is "twelve million, two thousand, four hundred twenty-one".