12061280 has 144 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 3717120.

The previous prime is 12061261. The next prime is 12061289. The reversal of 12061280 is 8216021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12061289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135476 + ... + 135564.

It is an arithmetic number, because the mean of its divisors is an integer number (251370).

Almost surely, 2^12061280 is an apocalyptic number.

12061280 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 12061280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18098640).

12061280 is an abundant number, since it is smaller than the sum of its proper divisors (24136000).

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

12061280 is a wasteful number, since it uses less digits than its factorization.

12061280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 12061280 is about 3472.9353578781. The cubic root of 12061280 is about 229.3318986149.

The spelling of 12061280 in words is "twelve million, sixty-one thousand, two hundred eighty".