12127290 has 128 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 2515968.

The previous prime is 12127289. The next prime is 12127309. The reversal of 12127290 is 9272121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12127290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 153471 + ... + 153549.

It is an arithmetic number, because the mean of its divisors is an integer number (285120).

Almost surely, 2^12127290 is an apocalyptic number.

12127290 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 12127290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18247680).

12127290 is an abundant number, since it is smaller than the sum of its proper divisors (24368070).

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

12127290 is a wasteful number, since it uses less digits than its factorization.

12127290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 12127290 is about 3482.4258786082. The cubic root of 12127290 is about 229.7495067447.

The spelling of 12127290 in words is "twelve million, one hundred twenty-seven thousand, two hundred ninety".