613540 has 12 divisors (see below), whose sum is σ = 1288476. Its totient is φ = 245408.

The previous prime is 613523. The next prime is 613549. The reversal of 613540 is 45316.

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 272484 = 584^2 + 522^2 .

It is not an unprimeable number, because it can be changed into a prime (613549) 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, 15319 + ... + 15358.

It is an arithmetic number, because the mean of its divisors is an integer number (107373).

2⁶¹³⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

613540 is an abundant number, since it is smaller than the sum of its proper divisors (674936).

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

613540 is a wasteful number, since it uses less digits than its factorization.

613540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30686 (or 30684 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 613540 is about 783.2879419473. The cubic root of 613540 is about 84.9730018062.

Adding to 613540 its reverse (45316), we get a palindrome (658856).

The spelling of 613540 in words is "six hundred thirteen thousand, five hundred forty".