85298721 has 8 divisors (see below), whose sum is σ = 113784000. Its totient is φ = 56839632.

The previous prime is 85298711. The next prime is 85298767. The reversal of 85298721 is 12789258.

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

It is not a de Polignac number, because 85298721 - 2¹⁰ = 85297697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (85298711) 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 7 ways as a sum of consecutive naturals, for example, 3076 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (14223000).

Almost surely, 2^85298721 is an apocalyptic number.

It is an amenable number.

85298721 is a deficient number, since it is larger than the sum of its proper divisors (28485279).

85298721 is a wasteful number, since it uses less digits than its factorization.

85298721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13095.

The product of its digits is 80640, while the sum is 42.

The square root of 85298721 is about 9235.7306695247. The cubic root of 85298721 is about 440.1974337785.

The spelling of 85298721 in words is "eighty-five million, two hundred ninety-eight thousand, seven hundred twenty-one".