13127440 has 20 divisors (see below), whose sum is σ = 30521484. Its totient is φ = 5250944.

The previous prime is 13127437. The next prime is 13127449. The reversal of 13127440 is 4472131.

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 7595536 = 2352^2 + 2756^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (13127449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81967 + ... + 82126.

Almost surely, 2^13127440 is an apocalyptic number.

13127440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13127440 is an abundant number, since it is smaller than the sum of its proper divisors (17394044).

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

13127440 is a wasteful number, since it uses less digits than its factorization.

13127440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164106 (or 164100 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 13127440 is about 3623.1809228908. The cubic root of 13127440 is about 235.8993154730.

Adding to 13127440 its reverse (4472131), we get a palindrome (17599571).

The spelling of 13127440 in words is "thirteen million, one hundred twenty-seven thousand, four hundred forty".