135022421 has 4 divisors (see below), whose sum is σ = 135708012. Its totient is φ = 134336832.

The previous prime is 135022411. The next prime is 135022427. The reversal of 135022421 is 124220531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65383396 + 69639025 = 8086^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 135022421 - 2¹⁴ = 135006037 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 = 135022393 and 135022402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135022427) 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 3 ways as a sum of consecutive naturals, for example, 342500 + ... + 342893.

It is an arithmetic number, because the mean of its divisors is an integer number (33927003).

Almost surely, 2^135022421 is an apocalyptic number.

It is an amenable number.

135022421 is a deficient number, since it is larger than the sum of its proper divisors (685591).

135022421 is an equidigital number, since it uses as much as digits as its factorization.

135022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685590.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 135022421 is about 11619.9148447826. The cubic root of 135022421 is about 513.0211819648.

Adding to 135022421 its reverse (124220531), we get a palindrome (259242952).

The spelling of 135022421 in words is "one hundred thirty-five million, twenty-two thousand, four hundred twenty-one".