135927421 has 12 divisors (see below), whose sum is σ = 158317500. Its totient is φ = 116363520.

The previous prime is 135927419. The next prime is 135927433. The reversal of 135927421 is 124729531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74132100 + 61795321 = 8610^2 + 7861^2 .

It is not a de Polignac number, because 135927421 - 2¹ = 135927419 is a prime.

It is a super-2 number, since 2×135927421² = 36952527559422482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135927521) 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 11 ways as a sum of consecutive naturals, for example, 60091 + ... + 62311.

It is an arithmetic number, because the mean of its divisors is an integer number (13193125).

Almost surely, 2^135927421 is an apocalyptic number.

It is an amenable number.

135927421 is a deficient number, since it is larger than the sum of its proper divisors (22390079).

135927421 is a wasteful number, since it uses less digits than its factorization.

135927421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484 (or 3477 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 135927421 is about 11658.7915754593. The cubic root of 135927421 is about 514.1648209481.

The spelling of 135927421 in words is "one hundred thirty-five million, nine hundred twenty-seven thousand, four hundred twenty-one".