12015420 has 24 divisors (see below), whose sum is σ = 33643344. Its totient is φ = 3204096.

The previous prime is 12015373. The next prime is 12015427. The reversal of 12015420 is 2451021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12015420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100069 + ... + 100188.

It is an arithmetic number, because the mean of its divisors is an integer number (1401806).

Almost surely, 2^12015420 is an apocalyptic number.

12015420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12015420 is an abundant number, since it is smaller than the sum of its proper divisors (21627924).

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

12015420 is a wasteful number, since it uses less digits than its factorization.

12015420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200269 (or 200267 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12015420 is about 3466.3265858831. The cubic root of 12015420 is about 229.0408703901.

Adding to 12015420 its reverse (2451021), we get a palindrome (14466441).

The spelling of 12015420 in words is "twelve million, fifteen thousand, four hundred twenty".