12140280 has 96 divisors (see below), whose sum is σ = 40950000. Its totient is φ = 3234816.

The previous prime is 12140273. The next prime is 12140287. The reversal of 12140280 is 8204121.

It is an interprime number because it is at equal distance from previous prime (12140273) and next prime (12140287).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12140287) 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, 9096 + ... + 10344.

Almost surely, 2^12140280 is an apocalyptic number.

12140280 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 12140280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20475000).

12140280 is an abundant number, since it is smaller than the sum of its proper divisors (28809720).

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

12140280 is a wasteful number, since it uses less digits than its factorization.

12140280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12140280 is about 3484.2904586156. The cubic root of 12140280 is about 229.8315086083.

It can be divided in two parts, 121 and 40280, that added together give a square (40401 = 201²).

The spelling of 12140280 in words is "twelve million, one hundred forty thousand, two hundred eighty".