135213245 has 8 divisors (see below), whose sum is σ = 163863000. Its totient is φ = 107099200.

The previous prime is 135213241. The next prime is 135213259. The reversal of 135213245 is 542312531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18335524 + 116877721 = 4282^2 + 10811^2 .

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

It is not a de Polignac number, because 135213245 - 2² = 135213241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135213241) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 133370 + ... + 134379.

It is an arithmetic number, because the mean of its divisors is an integer number (20482875).

Almost surely, 2^135213245 is an apocalyptic number.

It is an amenable number.

135213245 is a deficient number, since it is larger than the sum of its proper divisors (28649755).

135213245 is a wasteful number, since it uses less digits than its factorization.

135213245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267855.

The product of its digits is 3600, while the sum is 26.

The square root of 135213245 is about 11628.1230213651. The cubic root of 135213245 is about 513.2627484421.

Adding to 135213245 its reverse (542312531), we get a palindrome (677525776).

The spelling of 135213245 in words is "one hundred thirty-five million, two hundred thirteen thousand, two hundred forty-five".