136540 has 12 divisors (see below), whose sum is σ = 286776. Its totient is φ = 54608.

The previous prime is 136537. The next prime is 136541. The reversal of 136540 is 45631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136541) 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, 3394 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (23898).

2¹³⁶⁵⁴⁰ is an apocalyptic number.

136540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136540 is an abundant number, since it is smaller than the sum of its proper divisors (150236).

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

136540 is a wasteful number, since it uses less digits than its factorization.

136540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836 (or 6834 counting only the distinct ones).

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

The square root of 136540 is about 369.5131932692. The cubic root of 136540 is about 51.4936052638.

Adding to 136540 its product of nonzero digits (360), we get a square (136900 = 370²).

Subtracting from 136540 its reverse (45631), we obtain a palindrome (90909).

It can be divided in two parts, 136 and 540, that added together give a palindrome (676).

The spelling of 136540 in words is "one hundred thirty-six thousand, five hundred forty".