136235321 has 4 divisors (see below), whose sum is σ = 138268752. Its totient is φ = 134201892.

The previous prime is 136235299. The next prime is 136235327. The reversal of 136235321 is 123532631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123532631 = 41 ⋅3012991.

It is a cyclic number.

It is not a de Polignac number, because 136235321 - 2⁶ = 136235257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136235327) 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 3 ways as a sum of consecutive naturals, for example, 1016615 + ... + 1016748.

It is an arithmetic number, because the mean of its divisors is an integer number (34567188).

Almost surely, 2^136235321 is an apocalyptic number.

It is an amenable number.

136235321 is a deficient number, since it is larger than the sum of its proper divisors (2033431).

136235321 is an equidigital number, since it uses as much as digits as its factorization.

136235321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033430.

The product of its digits is 3240, while the sum is 26.

The square root of 136235321 is about 11671.9887337163. The cubic root of 136235321 is about 514.5527533777.

Adding to 136235321 its reverse (123532631), we get a palindrome (259767952).

The spelling of 136235321 in words is "one hundred thirty-six million, two hundred thirty-five thousand, three hundred twenty-one".