135213241 has 2 divisors, whose sum is σ = 135213242. Its totient is φ = 135213240.

The previous prime is 135213233. The next prime is 135213259. The reversal of 135213241 is 142312531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71149225 + 64064016 = 8435^2 + 8004^2 .

It is a cyclic number.

It is not a de Polignac number, because 135213241 - 2³ = 135213233 is a prime.

It is not a weakly prime, because it can be changed into another prime (130213241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67606620 + 67606621.

It is an arithmetic number, because the mean of its divisors is an integer number (67606621).

Almost surely, 2^135213241 is an apocalyptic number.

It is an amenable number.

135213241 is a deficient number, since it is larger than the sum of its proper divisors (1).

135213241 is an equidigital number, since it uses as much as digits as its factorization.

135213241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 135213241 is about 11628.1228493683. The cubic root of 135213241 is about 513.2627433809.

Adding to 135213241 its reverse (142312531), we get a palindrome (277525772).

The spelling of 135213241 in words is "one hundred thirty-five million, two hundred thirteen thousand, two hundred forty-one".