85802721 has 8 divisors (see below), whose sum is σ = 114563904. Its totient is φ = 57121680.

The previous prime is 85802681. The next prime is 85802737. The reversal of 85802721 is 12720858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85802721 - 2⁶ = 85802657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85802771) 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, 17490 + ... + 21851.

It is an arithmetic number, because the mean of its divisors is an integer number (14320488).

Almost surely, 2^85802721 is an apocalyptic number.

It is an amenable number.

85802721 is a deficient number, since it is larger than the sum of its proper divisors (28761183).

85802721 is a wasteful number, since it uses less digits than its factorization.

85802721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40071.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 85802721 is about 9262.9758177381. The cubic root of 85802721 is about 441.0627221425.

The spelling of 85802721 in words is "eighty-five million, eight hundred two thousand, seven hundred twenty-one".