134158681 has 4 divisors (see below), whose sum is σ = 134292132. Its totient is φ = 134025232.

The previous prime is 134158637. The next prime is 134158691. The reversal of 134158681 is 186851431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186851431 = 13 ⋅14373187.

It can be written as a sum of positive squares in 2 ways, for example, as 53158681 + 81000000 = 7291^2 + 9000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134158681 is a prime.

It is a super-2 number, since 2×134158681² = 35997103375319522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134158681.

It is not an unprimeable number, because it can be changed into a prime (134158691) 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, 65206 + ... + 67231.

It is an arithmetic number, because the mean of its divisors is an integer number (33573033).

Almost surely, 2^134158681 is an apocalyptic number.

It is an amenable number.

134158681 is a deficient number, since it is larger than the sum of its proper divisors (133451).

134158681 is a wasteful number, since it uses less digits than its factorization.

134158681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133450.

The product of its digits is 23040, while the sum is 37.

The square root of 134158681 is about 11582.6888501764. The cubic root of 134158681 is about 511.9249068438.

The spelling of 134158681 in words is "one hundred thirty-four million, one hundred fifty-eight thousand, six hundred eighty-one".