85272821 has 8 divisors (see below), whose sum is σ = 85872480. Its totient is φ = 84675888.

The previous prime is 85272809. The next prime is 85272839. The reversal of 85272821 is 12827258.

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 85272821 - 2¹⁸ = 85010677 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 (85272721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137450 + ... + 138068.

It is an arithmetic number, because the mean of its divisors is an integer number (10734060).

Almost surely, 2^85272821 is an apocalyptic number.

It is an amenable number.

85272821 is a deficient number, since it is larger than the sum of its proper divisors (599659).

85272821 is a wasteful number, since it uses less digits than its factorization.

85272821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363.

The product of its digits is 17920, while the sum is 35.

The square root of 85272821 is about 9234.3284000516. The cubic root of 85272821 is about 440.1528755971.

The spelling of 85272821 in words is "eighty-five million, two hundred seventy-two thousand, eight hundred twenty-one".