12486421 has 4 divisors (see below), whose sum is σ = 12515692. Its totient is φ = 12457152.

The previous prime is 12486407. The next prime is 12486457. The reversal of 12486421 is 12468421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12468421 = 7 ⋅1781203.

It can be written as a sum of positive squares in 2 ways, for example, as 4363921 + 8122500 = 2089^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 12486421 - 2⁵ = 12486389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12486421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12486121) 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 3 ways as a sum of consecutive naturals, for example, 13986 + ... + 14851.

It is an arithmetic number, because the mean of its divisors is an integer number (3128923).

Almost surely, 2^12486421 is an apocalyptic number.

It is an amenable number.

12486421 is a deficient number, since it is larger than the sum of its proper divisors (29271).

12486421 is an equidigital number, since it uses as much as digits as its factorization.

12486421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29270.

The product of its digits is 3072, while the sum is 28.

The square root of 12486421 is about 3533.6130235214. The cubic root of 12486421 is about 231.9953737187.

The spelling of 12486421 in words is "twelve million, four hundred eighty-six thousand, four hundred twenty-one".