12354821 has 2 divisors, whose sum is σ = 12354822. Its totient is φ = 12354820.

The previous prime is 12354809. The next prime is 12354851. The reversal of 12354821 is 12845321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8473921 + 3880900 = 2911^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 12354821 - 2¹⁴ = 12338437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12354851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6177410 + 6177411.

It is an arithmetic number, because the mean of its divisors is an integer number (6177411).

Almost surely, 2^12354821 is an apocalyptic number.

It is an amenable number.

12354821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12354821 is an equidigital number, since it uses as much as digits as its factorization.

12354821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 12354821 is about 3514.9425315359. The cubic root of 12354821 is about 231.1774590098.

The spelling of 12354821 in words is "twelve million, three hundred fifty-four thousand, eight hundred twenty-one".