135023321 has 16 divisors (see below), whose sum is σ = 142775808. Its totient is φ = 127526400.

The previous prime is 135023303. The next prime is 135023347. The reversal of 135023321 is 123320531.

It is a cyclic number.

It is not a de Polignac number, because 135023321 - 2¹⁸ = 134761177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135023293 and 135023302.

It is not an unprimeable number, because it can be changed into a prime (135023351) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 249311 + ... + 249851.

It is an arithmetic number, because the mean of its divisors is an integer number (8923488).

Almost surely, 2^135023321 is an apocalyptic number.

It is an amenable number.

135023321 is a deficient number, since it is larger than the sum of its proper divisors (7752487).

135023321 is an equidigital number, since it uses as much as digits as its factorization.

135023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 135023321 is about 11619.9535713358. The cubic root of 135023321 is about 513.0223218200.

Adding to 135023321 its reverse (123320531), we get a palindrome (258343852).

The spelling of 135023321 in words is "one hundred thirty-five million, twenty-three thousand, three hundred twenty-one".