135129201 has 4 divisors (see below), whose sum is σ = 180172272. Its totient is φ = 90086132.

The previous prime is 135129199. The next prime is 135129221. The reversal of 135129201 is 102921531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135129201 - 2¹ = 135129199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135129221) 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, 22521531 + ... + 22521536.

It is an arithmetic number, because the mean of its divisors is an integer number (45043068).

Almost surely, 2^135129201 is an apocalyptic number.

It is an amenable number.

135129201 is a deficient number, since it is larger than the sum of its proper divisors (45043071).

135129201 is an equidigital number, since it uses as much as digits as its factorization.

135129201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45043070.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 135129201 is about 11624.5086347768. The cubic root of 135129201 is about 513.1563841212.

The spelling of 135129201 in words is "one hundred thirty-five million, one hundred twenty-nine thousand, two hundred one".