13043540 has 24 divisors (see below), whose sum is σ = 27459432. Its totient is φ = 5204480.

The previous prime is 13043497. The next prime is 13043561. The reversal of 13043540 is 4534031.

It can be written as a sum of positive squares in 4 ways, for example, as 568516 + 12475024 = 754^2 + 3532^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14792 + ... + 15648.

It is an arithmetic number, because the mean of its divisors is an integer number (1144143).

Almost surely, 2^13043540 is an apocalyptic number.

13043540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13043540 is an abundant number, since it is smaller than the sum of its proper divisors (14415892).

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

13043540 is a wasteful number, since it uses less digits than its factorization.

13043540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13043540 is about 3611.5841399585. The cubic root of 13043540 is about 235.3956816686.

Adding to 13043540 its reverse (4534031), we get a palindrome (17577571).

The spelling of 13043540 in words is "thirteen million, forty-three thousand, five hundred forty".