12302421 has 4 divisors (see below), whose sum is σ = 16403232. Its totient is φ = 8201612.

The previous prime is 12302417. The next prime is 12302431. The reversal of 12302421 is 12420321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12420321 = 3 ⋅4140107.

It is a cyclic number.

It is not a de Polignac number, because 12302421 - 2² = 12302417 is a prime.

It is a super-2 number, since 2×12302421² = 302699124922482, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 12302421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12302431) 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, 2050401 + ... + 2050406.

It is an arithmetic number, because the mean of its divisors is an integer number (4100808).

Almost surely, 2^12302421 is an apocalyptic number.

It is an amenable number.

12302421 is a deficient number, since it is larger than the sum of its proper divisors (4100811).

12302421 is an equidigital number, since it uses as much as digits as its factorization.

12302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100810.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12302421 is about 3507.4807198330. The cubic root of 12302421 is about 230.8501680114.

Adding to 12302421 its reverse (12420321), we get a palindrome (24722742).

The spelling of 12302421 in words is "twelve million, three hundred two thousand, four hundred twenty-one".