136481 has 2 divisors, whose sum is σ = 136482. Its totient is φ = 136480.

The previous prime is 136471. The next prime is 136483. The reversal of 136481 is 184631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78400 + 58081 = 280^2 + 241^2 .

It is an emirp because it is prime and its reverse (184631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136481 - 2⁶ = 136417 is a prime.

It is a super-2 number, since 2×136481² = 37254126722, which contains 22 as substring.

Together with 136483, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136481.

It is not a weakly prime, because it can be changed into another prime (136483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68240 + 68241.

It is an arithmetic number, because the mean of its divisors is an integer number (68241).

2¹³⁶⁴⁸¹ is an apocalyptic number.

It is an amenable number.

136481 is a deficient number, since it is larger than the sum of its proper divisors (1).

136481 is an equidigital number, since it uses as much as digits as its factorization.

136481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 136481 is about 369.4333498752. The cubic root of 136481 is about 51.4861872656.

The spelling of 136481 in words is "one hundred thirty-six thousand, four hundred eighty-one".