12421863 has 32 divisors (see below), whose sum is σ = 19514880. Its totient is φ = 7793280.

The previous prime is 12421861. The next prime is 12421873. The reversal of 12421863 is 36812421.

It is not a de Polignac number, because 12421863 - 2¹ = 12421861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

12421863 is a modest number, since divided by 1863 gives 1242 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51423 + ... + 51663.

It is an arithmetic number, because the mean of its divisors is an integer number (609840).

Almost surely, 2^12421863 is an apocalyptic number.

12421863 is a deficient number, since it is larger than the sum of its proper divisors (7093017).

12421863 is a wasteful number, since it uses less digits than its factorization.

12421863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

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

The square root of 12421863 is about 3524.4663425829. The cubic root of 12421863 is about 231.5948574659.

It can be divided in two parts, 12 and 421863, that added together give a cube (421875 = 75³).

The spelling of 12421863 in words is "twelve million, four hundred twenty-one thousand, eight hundred sixty-three".