12127440 has 160 divisors (see below), whose sum is σ = 42497280. Its totient is φ = 2855424.

The previous prime is 12127433. The next prime is 12127447. The reversal of 12127440 is 4472121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12127433) and next prime (12127447).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127447) 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, 527269 + ... + 527291.

It is an arithmetic number, because the mean of its divisors is an integer number (265608).

Almost surely, 2^12127440 is an apocalyptic number.

12127440 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 12127440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21248640).

12127440 is an abundant number, since it is smaller than the sum of its proper divisors (30369840).

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

12127440 is a wasteful number, since it uses less digits than its factorization.

12127440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 12127440 is about 3482.4474152527. The cubic root of 12127440 is about 229.7504539825.

Adding to 12127440 its reverse (4472121), we get a palindrome (16599561).

The spelling of 12127440 in words is "twelve million, one hundred twenty-seven thousand, four hundred forty".