135521266 has 4 divisors (see below), whose sum is σ = 203281902. Its totient is φ = 67760632.

The previous prime is 135521249. The next prime is 135521273. The reversal of 135521266 is 662125531.

135521266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 106523041 + 28998225 = 10321^2 + 5385^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33880315 + ... + 33880318.

Almost surely, 2^135521266 is an apocalyptic number.

135521266 is a deficient number, since it is larger than the sum of its proper divisors (67760636).

135521266 is an equidigital number, since it uses as much as digits as its factorization.

135521266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67760635.

The product of its digits is 10800, while the sum is 31.

The square root of 135521266 is about 11641.3601439007. The cubic root of 135521266 is about 513.6521969940.

Adding to 135521266 its reverse (662125531), we get a palindrome (797646797).

The spelling of 135521266 in words is "one hundred thirty-five million, five hundred twenty-one thousand, two hundred sixty-six".