12619421 has 2 divisors, whose sum is σ = 12619422. Its totient is φ = 12619420.

The previous prime is 12619391. The next prime is 12619427. The reversal of 12619421 is 12491621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 264196 = 3515^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 12619421 - 2¹⁴ = 12603037 is a prime.

It is equal to p₈₂₆₀₁₉ and since 12619421 and 826019 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12619427) 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 as a sum of consecutive naturals, namely, 6309710 + 6309711.

It is an arithmetic number, because the mean of its divisors is an integer number (6309711).

Almost surely, 2^12619421 is an apocalyptic number.

It is an amenable number.

12619421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12619421 is an equidigital number, since it uses as much as digits as its factorization.

12619421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 12619421 is about 3552.3824399971. The cubic root of 12619421 is about 232.8161713848.

The spelling of 12619421 in words is "twelve million, six hundred nineteen thousand, four hundred twenty-one".