135173212 has 12 divisors (see below), whose sum is σ = 238416640. Its totient is φ = 67054176.

The previous prime is 135173197. The next prime is 135173251. The reversal of 135173212 is 212371531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132537 + ... + 133552.

Almost surely, 2^135173212 is an apocalyptic number.

It is an amenable number.

135173212 is a deficient number, since it is larger than the sum of its proper divisors (103243428).

135173212 is a wasteful number, since it uses less digits than its factorization.

135173212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266220 (or 266218 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 135173212 is about 11626.4015069152. The cubic root of 135173212 is about 513.2120890170.

The spelling of 135173212 in words is "one hundred thirty-five million, one hundred seventy-three thousand, two hundred twelve".