134628581 has 2 divisors, whose sum is σ = 134628582. Its totient is φ = 134628580.

The previous prime is 134628551. The next prime is 134628601. The reversal of 134628581 is 185826431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111492481 + 23136100 = 10559^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 134628581 - 2²² = 130434277 is a prime.

It is a super-2 number, since 2×134628581² = 36249709644147122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134628511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67314290 + 67314291.

It is an arithmetic number, because the mean of its divisors is an integer number (67314291).

Almost surely, 2^134628581 is an apocalyptic number.

It is an amenable number.

134628581 is a deficient number, since it is larger than the sum of its proper divisors (1).

134628581 is an equidigital number, since it uses as much as digits as its factorization.

134628581 is an evil number, because the sum of its binary digits is even.

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

The square root of 134628581 is about 11602.9557010272. The cubic root of 134628581 is about 512.5218944444.

The spelling of 134628581 in words is "one hundred thirty-four million, six hundred twenty-eight thousand, five hundred eighty-one".