135421105 has 4 divisors (see below), whose sum is σ = 162505332. Its totient is φ = 108336880.

The previous prime is 135421087. The next prime is 135421129. The reversal of 135421105 is 501124531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501124531 = 479 ⋅1046189.

It can be written as a sum of positive squares in 2 ways, for example, as 85803169 + 49617936 = 9263^2 + 7044^2 .

It is not a de Polignac number, because 135421105 - 2¹¹ = 135419057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13542106 + ... + 13542115.

It is an arithmetic number, because the mean of its divisors is an integer number (40626333).

Almost surely, 2^135421105 is an apocalyptic number.

It is an amenable number.

135421105 is a deficient number, since it is larger than the sum of its proper divisors (27084227).

135421105 is an equidigital number, since it uses as much as digits as its factorization.

135421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27084226.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 135421105 is about 11637.0574029692. The cubic root of 135421105 is about 513.5256225231.

Adding to 135421105 its reverse (501124531), we get a palindrome (636545636).

The spelling of 135421105 in words is "one hundred thirty-five million, four hundred twenty-one thousand, one hundred five".