135876321 has 48 divisors (see below), whose sum is σ = 233895168. Its totient is φ = 74390400.

The previous prime is 135876313. The next prime is 135876329. The reversal of 135876321 is 123678531.

135876321 is a `hidden beast` number, since 13 + 5 + 8 + 7 + 632 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (135876313) and next prime (135876329).

It is not a de Polignac number, because 135876321 - 2³ = 135876313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135876329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165091 + ... + 165911.

It is an arithmetic number, because the mean of its divisors is an integer number (4872816).

Almost surely, 2^135876321 is an apocalyptic number.

It is an amenable number.

135876321 is a deficient number, since it is larger than the sum of its proper divisors (98018847).

135876321 is a wasteful number, since it uses less digits than its factorization.

135876321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 939 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 135876321 is about 11656.5998901910. The cubic root of 135876321 is about 514.1003818642.

The spelling of 135876321 in words is "one hundred thirty-five million, eight hundred seventy-six thousand, three hundred twenty-one".