135886481 has 4 divisors (see below), whose sum is σ = 136102464. Its totient is φ = 135670500.

The previous prime is 135886453. The next prime is 135886523. The reversal of 135886481 is 184688531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184688531 = 19 ⋅9720449.

It is a cyclic number.

It is not a de Polignac number, because 135886481 - 2²² = 131692177 is a prime.

It is a super-2 number, since 2×135886481² = 36930271437126722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135886441) 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, 107045 + ... + 108306.

It is an arithmetic number, because the mean of its divisors is an integer number (34025616).

Almost surely, 2^135886481 is an apocalyptic number.

It is an amenable number.

135886481 is a deficient number, since it is larger than the sum of its proper divisors (215983).

135886481 is an equidigital number, since it uses as much as digits as its factorization.

135886481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215982.

The product of its digits is 184320, while the sum is 44.

The square root of 135886481 is about 11657.0356866572. The cubic root of 135886481 is about 514.1131953053.

The spelling of 135886481 in words is "one hundred thirty-five million, eight hundred eighty-six thousand, four hundred eighty-one".