134217581 has 8 divisors (see below), whose sum is σ = 141973440. Its totient is φ = 126621792.

The previous prime is 134217541. The next prime is 134217593. The reversal of 134217581 is 185712431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 134217581 - 2¹⁰ = 134216557 is a prime.

It is a super-2 number, since 2×134217581² = 36028718098983122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134217541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38291 + ... + 41648.

It is an arithmetic number, because the mean of its divisors is an integer number (17746680).

Almost surely, 2^134217581 is an apocalyptic number.

It is an amenable number.

134217581 is a deficient number, since it is larger than the sum of its proper divisors (7755859).

134217581 is an equidigital number, since it uses as much as digits as its factorization.

134217581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80035.

The product of its digits is 6720, while the sum is 32.

The square root of 134217581 is about 11585.2311586778. The cubic root of 134217581 is about 511.9998130798. Note that the first 3 decimals are identical.

The spelling of 134217581 in words is "one hundred thirty-four million, two hundred seventeen thousand, five hundred eighty-one".