136416521 has 8 divisors (see below), whose sum is σ = 140349504. Its totient is φ = 132496560.

The previous prime is 136416509. The next prime is 136416569. The reversal of 136416521 is 125614631.

It is a happy number.

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 136416521 - 2²² = 132222217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136416421) 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, 20426 + ... + 26268.

It is an arithmetic number, because the mean of its divisors is an integer number (17543688).

Almost surely, 2^136416521 is an apocalyptic number.

It is an amenable number.

136416521 is a deficient number, since it is larger than the sum of its proper divisors (3932983).

136416521 is an equidigital number, since it uses as much as digits as its factorization.

136416521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511.

The product of its digits is 4320, while the sum is 29.

The square root of 136416521 is about 11679.7483277680. The cubic root of 136416521 is about 514.7807795413.

The spelling of 136416521 in words is "one hundred thirty-six million, four hundred sixteen thousand, five hundred twenty-one".