135356321 has 4 divisors (see below), whose sum is σ = 135616644. Its totient is φ = 135096000.

The previous prime is 135356297. The next prime is 135356359. The reversal of 135356321 is 123653531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123653531 = 5051 ⋅24481.

It can be written as a sum of positive squares in 2 ways, for example, as 79405921 + 55950400 = 8911^2 + 7480^2 .

It is a cyclic number.

It is not a de Polignac number, because 135356321 - 2¹⁴ = 135339937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135356371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129380 + ... + 130421.

It is an arithmetic number, because the mean of its divisors is an integer number (33904161).

Almost surely, 2^135356321 is an apocalyptic number.

It is an amenable number.

135356321 is a deficient number, since it is larger than the sum of its proper divisors (260323).

135356321 is an equidigital number, since it uses as much as digits as its factorization.

135356321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260322.

The product of its digits is 8100, while the sum is 29.

The square root of 135356321 is about 11634.2735484430. The cubic root of 135356321 is about 513.4437210834.

The spelling of 135356321 in words is "one hundred thirty-five million, three hundred fifty-six thousand, three hundred twenty-one".