12312421 has 8 divisors (see below), whose sum is σ = 13457664. Its totient is φ = 11171520.

The previous prime is 12312413. The next prime is 12312427. The reversal of 12312421 is 12421321.

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

It is a cyclic number.

It is not a de Polignac number, because 12312421 - 2³ = 12312413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12312395 and 12312404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8845 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (1682208).

Almost surely, 2^12312421 is an apocalyptic number.

12312421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12312421 is a deficient number, since it is larger than the sum of its proper divisors (1145243).

12312421 is a wasteful number, since it uses less digits than its factorization.

12312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its digits is 96, while the sum is 16.

The square root of 12312421 is about 3508.9059548526. The cubic root of 12312421 is about 230.9126997813.

Adding to 12312421 its reverse (12421321), we get a palindrome (24733742).

Subtracting 12312421 from its reverse (12421321), we obtain a square (108900 = 330²).

It can be divided in two parts, 123 and 12421, that added together give a square (12544 = 112²).

The spelling of 12312421 in words is "twelve million, three hundred twelve thousand, four hundred twenty-one".