135421686 has 32 divisors (see below), whose sum is σ = 303613920. Its totient is φ = 44739072.

The previous prime is 135421679. The next prime is 135421687. The reversal of 135421686 is 686124531.

It is a happy number.

135421686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 135421686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4995 + ... + 17198.

It is an arithmetic number, because the mean of its divisors is an integer number (9487935).

Almost surely, 2^135421686 is an apocalyptic number.

135421686 is an abundant number, since it is smaller than the sum of its proper divisors (168192234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135421686 is a wasteful number, since it uses less digits than its factorization.

135421686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22317 (or 22311 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 135421686 is about 11637.0823662978. The cubic root of 135421686 is about 513.5263569186.

It can be divided in two parts, 135 and 421686, that added together give a triangular number (421821 = T₉₁₈).

The spelling of 135421686 in words is "one hundred thirty-five million, four hundred twenty-one thousand, six hundred eighty-six".