12466921 has 4 divisors (see below), whose sum is σ = 12474000. Its totient is φ = 12459844.

The previous prime is 12466913. The next prime is 12466931. The reversal of 12466921 is 12966421.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12466921 - 2³ = 12466913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12466931) 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, 1410 + ... + 5188.

It is an arithmetic number, because the mean of its divisors is an integer number (3118500).

Almost surely, 2^12466921 is an apocalyptic number.

It is an amenable number.

12466921 is a deficient number, since it is larger than the sum of its proper divisors (7079).

12466921 is an equidigital number, since it uses as much as digits as its factorization.

12466921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078.

The product of its digits is 5184, while the sum is 31.

The square root of 12466921 is about 3530.8527298657. The cubic root of 12466921 is about 231.8745420081.

Subtracting 12466921 from its reverse (12966421), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 12466921 in words is "twelve million, four hundred sixty-six thousand, nine hundred twenty-one".