13005240 has 32 divisors (see below), whose sum is σ = 39016080. Its totient is φ = 3468032.

The previous prime is 13005233. The next prime is 13005259. The reversal of 13005240 is 4250031.

13005240 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54069 + ... + 54308.

Almost surely, 2^13005240 is an apocalyptic number.

13005240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13005240 is an abundant number, since it is smaller than the sum of its proper divisors (26010840).

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

13005240 is a wasteful number, since it uses less digits than its factorization.

13005240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108391 (or 108387 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 13005240 is about 3606.2778595111. The cubic root of 13005240 is about 235.1650568200.

Adding to 13005240 its reverse (4250031), we get a palindrome (17255271).

The spelling of 13005240 in words is "thirteen million, five thousand, two hundred forty".