86455721 has 8 divisors (see below), whose sum is σ = 94385088. Its totient is φ = 78538000.

The previous prime is 86455703. The next prime is 86455723. The reversal of 86455721 is 12755468.

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 86455721 - 2⁶ = 86455657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86455723) 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, 21716 + ... + 25386.

It is an arithmetic number, because the mean of its divisors is an integer number (11798136).

Almost surely, 2^86455721 is an apocalyptic number.

It is an amenable number.

86455721 is a deficient number, since it is larger than the sum of its proper divisors (7929367).

86455721 is a wasteful number, since it uses less digits than its factorization.

86455721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823.

The product of its digits is 67200, while the sum is 38.

The square root of 86455721 is about 9298.1568603675. The cubic root of 86455721 is about 442.1787954876.

The spelling of 86455721 in words is "eighty-six million, four hundred fifty-five thousand, seven hundred twenty-one".