12863421 has 8 divisors (see below), whose sum is σ = 19056960. Its totient is φ = 8575596.

The previous prime is 12863413. The next prime is 12863429. The reversal of 12863421 is 12436821.

12863421 is a `hidden beast` number, since 1 + 2 + 8 + 634 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (12863413) and next prime (12863429).

It is not a de Polignac number, because 12863421 - 2³ = 12863413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 476423 = 12863421 / (1 + 2 + 8 + 6 + 3 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863429) 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 7 ways as a sum of consecutive naturals, for example, 238185 + ... + 238238.

It is an arithmetic number, because the mean of its divisors is an integer number (2382120).

Almost surely, 2^12863421 is an apocalyptic number.

It is an amenable number.

12863421 is a deficient number, since it is larger than the sum of its proper divisors (6193539).

12863421 is an equidigital number, since it uses as much as digits as its factorization.

12863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476432 (or 476426 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 12863421 is about 3586.5611663542. The cubic root of 12863421 is about 234.3071246651.

The spelling of 12863421 in words is "twelve million, eight hundred sixty-three thousand, four hundred twenty-one".