13281250 has 36 divisors (see below), whose sum is σ = 26367174. Its totient is φ = 5000000.

The previous prime is 13281241. The next prime is 13281251. The reversal of 13281250 is 5218231.

It can be written as a sum of positive squares in 9 ways, for example, as 13271449 + 9801 = 3643^2 + 99^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13281251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 781242 + ... + 781258.

Almost surely, 2^13281250 is an apocalyptic number.

13281250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13281250 is a deficient number, since it is larger than the sum of its proper divisors (13085924).

13281250 is an frugal number, since it uses more digits than its factorization.

13281250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 13281250 is about 3644.3449342783. The cubic root of 13281250 is about 236.8170592965.

Adding to 13281250 its reverse (5218231), we get a palindrome (18499481).

It can be divided in two parts, 13281 and 250, that added together give a palindrome (13531).

The spelling of 13281250 in words is "thirteen million, two hundred eighty-one thousand, two hundred fifty".