86135621 has 16 divisors (see below), whose sum is σ = 105598080. Its totient is φ = 69136320.

The previous prime is 86135611. The next prime is 86135627. The reversal of 86135621 is 12653168.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-86135621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86135627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9806 + ... + 16383.

It is an arithmetic number, because the mean of its divisors is an integer number (6599880).

Almost surely, 2^86135621 is an apocalyptic number.

It is an amenable number.

86135621 is a deficient number, since it is larger than the sum of its proper divisors (19462459).

86135621 is a wasteful number, since it uses less digits than its factorization.

86135621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26236.

The product of its digits is 8640, while the sum is 32.

The square root of 86135621 is about 9280.9278092225. The cubic root of 86135621 is about 441.6324021992.

Adding to 86135621 its reverse (12653168), we get a palindrome (98788789).

The spelling of 86135621 in words is "eighty-six million, one hundred thirty-five thousand, six hundred twenty-one".