135602321 has 2 divisors, whose sum is σ = 135602322. Its totient is φ = 135602320.

The previous prime is 135602279. The next prime is 135602333. The reversal of 135602321 is 123206531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123099025 + 12503296 = 11095^2 + 3536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135602321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135602351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67801160 + 67801161.

It is an arithmetic number, because the mean of its divisors is an integer number (67801161).

Almost surely, 2^135602321 is an apocalyptic number.

It is an amenable number.

135602321 is a deficient number, since it is larger than the sum of its proper divisors (1).

135602321 is an equidigital number, since it uses as much as digits as its factorization.

135602321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 135602321 is about 11644.8409607002. The cubic root of 135602321 is about 513.7545813710.

Adding to 135602321 its reverse (123206531), we get a palindrome (258808852).

The spelling of 135602321 in words is "one hundred thirty-five million, six hundred two thousand, three hundred twenty-one".