12981270 has 64 divisors (see below), whose sum is σ = 33073920. Its totient is φ = 3255168.

The previous prime is 12981263. The next prime is 12981271. The reversal of 12981270 is 7218921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37237 + ... + 37583.

It is an arithmetic number, because the mean of its divisors is an integer number (516780).

Almost surely, 2^12981270 is an apocalyptic number.

12981270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12981270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16536960).

12981270 is an abundant number, since it is smaller than the sum of its proper divisors (20092650).

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

12981270 is a wasteful number, since it uses less digits than its factorization.

12981270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12981270 is about 3602.9529555630. The cubic root of 12981270 is about 235.0204901403.

The spelling of 12981270 in words is "twelve million, nine hundred eighty-one thousand, two hundred seventy".