13145240 has 32 divisors (see below), whose sum is σ = 30533760. Its totient is φ = 5088000.

The previous prime is 13145203. The next prime is 13145243. The reversal of 13145240 is 4254131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4061 + ... + 6540.

It is an arithmetic number, because the mean of its divisors is an integer number (954180).

Almost surely, 2^13145240 is an apocalyptic number.

13145240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13145240 is an abundant number, since it is smaller than the sum of its proper divisors (17388520).

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

13145240 is a wasteful number, since it uses less digits than its factorization.

13145240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10643 (or 10639 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 13145240 is about 3625.6364958446. The cubic root of 13145240 is about 236.0058889654.

Adding to 13145240 its reverse (4254131), we get a palindrome (17399371).

The spelling of 13145240 in words is "thirteen million, one hundred forty-five thousand, two hundred forty".