12421854 has 12 divisors (see below), whose sum is σ = 26914056. Its totient is φ = 4140612.

The previous prime is 12421853. The next prime is 12421859. The reversal of 12421854 is 45812421.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 345034 + ... + 345069.

It is an arithmetic number, because the mean of its divisors is an integer number (2242838).

Almost surely, 2^12421854 is an apocalyptic number.

12421854 is an abundant number, since it is smaller than the sum of its proper divisors (14492202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421854 is a wasteful number, since it uses less digits than its factorization.

12421854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690111 (or 690108 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 12421854 is about 3524.4650657937. The cubic root of 12421854 is about 231.5948015335.

The spelling of 12421854 in words is "twelve million, four hundred twenty-one thousand, eight hundred fifty-four".