134826581 has 4 divisors (see below), whose sum is σ = 135026412. Its totient is φ = 134626752.

The previous prime is 134826563. The next prime is 134826589. The reversal of 134826581 is 185628431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124322500 + 10504081 = 11150^2 + 3241^2 .

It is a cyclic number.

It is not a de Polignac number, because 134826581 - 2¹⁰ = 134825557 is a prime.

It is a super-2 number, since 2×134826581² = 36356413888299122, 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 (134826589) 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, 98900 + ... + 100253.

It is an arithmetic number, because the mean of its divisors is an integer number (33756603).

Almost surely, 2^134826581 is an apocalyptic number.

It is an amenable number.

134826581 is a deficient number, since it is larger than the sum of its proper divisors (199831).

134826581 is an equidigital number, since it uses as much as digits as its factorization.

134826581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199830.

The product of its digits is 46080, while the sum is 38.

The square root of 134826581 is about 11611.4848748986. The cubic root of 134826581 is about 512.7730289013.

The spelling of 134826581 in words is "one hundred thirty-four million, eight hundred twenty-six thousand, five hundred eighty-one".