135129206 has 4 divisors (see below), whose sum is σ = 202693812. Its totient is φ = 67564602.

The previous prime is 135129199. The next prime is 135129221. The reversal of 135129206 is 602921531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602921531 = 59 ⋅10219009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33782300 + ... + 33782303.

It is an arithmetic number, because the mean of its divisors is an integer number (50673453).

Almost surely, 2^135129206 is an apocalyptic number.

135129206 is a deficient number, since it is larger than the sum of its proper divisors (67564606).

135129206 is an equidigital number, since it uses as much as digits as its factorization.

135129206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67564605.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 135129206 is about 11624.5088498396. The cubic root of 135129206 is about 513.1563904504.

The spelling of 135129206 in words is "one hundred thirty-five million, one hundred twenty-nine thousand, two hundred six".