12015280 has 40 divisors (see below), whose sum is σ = 28904400. Its totient is φ = 4639488.

The previous prime is 12015271. The next prime is 12015281. The reversal of 12015280 is 8251021.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (12015281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (722610).

Almost surely, 2^12015280 is an apocalyptic number.

12015280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12015280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14452200).

12015280 is an abundant number, since it is smaller than the sum of its proper divisors (16889120).

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

12015280 is a wasteful number, since it uses less digits than its factorization.

12015280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12015280 is about 3466.3063915355. The cubic root of 12015280 is about 229.0399808152.

It can be divided in two parts, 120 and 15280, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 12015280 in words is "twelve million, fifteen thousand, two hundred eighty".