135541257 has 8 divisors (see below), whose sum is σ = 180876960. Its totient is φ = 90283200.

The previous prime is 135541253. The next prime is 135541267. The reversal of 135541257 is 752145531.

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

It is not a de Polignac number, because 135541257 - 2² = 135541253 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (135541253) 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, 15207 + ... + 22412.

It is an arithmetic number, because the mean of its divisors is an integer number (22609620).

Almost surely, 2^135541257 is an apocalyptic number.

It is an amenable number.

135541257 is a deficient number, since it is larger than the sum of its proper divisors (45335703).

135541257 is a wasteful number, since it uses less digits than its factorization.

135541257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38823.

The product of its digits is 21000, while the sum is 33.

The square root of 135541257 is about 11642.2187318397. The cubic root of 135541257 is about 513.6774523567.

Adding to 135541257 its reverse (752145531), we get a palindrome (887686788).

The spelling of 135541257 in words is "one hundred thirty-five million, five hundred forty-one thousand, two hundred fifty-seven".