135601243 has 8 divisors (see below), whose sum is σ = 137073600. Its totient is φ = 134133888.

The previous prime is 135601237. The next prime is 135601253. The reversal of 135601243 is 342106531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135601243 - 2⁵ = 135601211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135601253) 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, 80413 + ... + 82081.

It is an arithmetic number, because the mean of its divisors is an integer number (17134200).

Almost surely, 2^135601243 is an apocalyptic number.

135601243 is a deficient number, since it is larger than the sum of its proper divisors (1472357).

135601243 is a wasteful number, since it uses less digits than its factorization.

135601243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 135601243 is about 11644.7946740164. The cubic root of 135601243 is about 513.7532199663.

Adding to 135601243 its reverse (342106531), we get a palindrome (477707774).

The spelling of 135601243 in words is "one hundred thirty-five million, six hundred one thousand, two hundred forty-three".