12387420 has 36 divisors (see below), whose sum is σ = 37575720. Its totient is φ = 3303264.

The previous prime is 12387377. The next prime is 12387433. The reversal of 12387420 is 2478321.

12387420 is a `hidden beast` number, since 1 + 238 + 7 + 420 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 34230 + ... + 34589.

It is an arithmetic number, because the mean of its divisors is an integer number (1043770).

Almost surely, 2^12387420 is an apocalyptic number.

12387420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12387420 is an abundant number, since it is smaller than the sum of its proper divisors (25188300).

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

12387420 is a wasteful number, since it uses less digits than its factorization.

12387420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68834 (or 68829 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 12387420 is about 3519.5766790908. The cubic root of 12387420 is about 231.3806060370.

Subtracting from 12387420 its reverse (2478321), we obtain a palindrome (9909099).

The spelling of 12387420 in words is "twelve million, three hundred eighty-seven thousand, four hundred twenty".