134155521 has 20 divisors (see below), whose sum is σ = 202192452. Its totient is φ = 88639488.

The previous prime is 134155519. The next prime is 134155529. The reversal of 134155521 is 125551431.

134155521 is a `hidden beast` number, since 134 + 1 + 5 + 5 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 71571600 + 62583921 = 8460^2 + 7911^2 .

It is not a de Polignac number, because 134155521 - 2¹ = 134155519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (134155529) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1825 + ... + 16481.

Almost surely, 2^134155521 is an apocalyptic number.

It is an amenable number.

134155521 is a deficient number, since it is larger than the sum of its proper divisors (68036931).

134155521 is a wasteful number, since it uses less digits than its factorization.

134155521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14782 (or 14773 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 134155521 is about 11582.5524389057. The cubic root of 134155521 is about 511.9208874855.

The spelling of 134155521 in words is "one hundred thirty-four million, one hundred fifty-five thousand, five hundred twenty-one".