12421140 has 48 divisors (see below), whose sum is σ = 34964160. Its totient is φ = 3294720.

The previous prime is 12421121. The next prime is 12421163. The reversal of 12421140 is 4112421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14031 + ... + 14889.

It is an arithmetic number, because the mean of its divisors is an integer number (728420).

Almost surely, 2^12421140 is an apocalyptic number.

12421140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421140 is an abundant number, since it is smaller than the sum of its proper divisors (22543020).

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

12421140 is a wasteful number, since it uses less digits than its factorization.

12421140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 12421140 is about 3524.3637723708. The cubic root of 12421140 is about 231.5903641428.

Adding to 12421140 its reverse (4112421), we get a palindrome (16533561).

It can be divided in two parts, 124211 and 40, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 12421140 in words is "twelve million, four hundred twenty-one thousand, one hundred forty".