12676421 has 6 divisors (see below), whose sum is σ = 12994866. Its totient is φ = 12365600.

The previous prime is 12676387. The next prime is 12676423. The reversal of 12676421 is 12467621.

It can be written as a sum of positive squares in 3 ways, for example, as 1852321 + 10824100 = 1361^2 + 3290^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12676421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12676423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2090 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (2165811).

Almost surely, 2^12676421 is an apocalyptic number.

It is an amenable number.

12676421 is a deficient number, since it is larger than the sum of its proper divisors (318445).

12676421 is an frugal number, since it uses more digits than its factorization.

12676421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623 (or 7582 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 12676421 is about 3560.3961858198. The cubic root of 12676421 is about 233.1661766518.

The spelling of 12676421 in words is "twelve million, six hundred seventy-six thousand, four hundred twenty-one".