85720245 has 48 divisors (see below), whose sum is σ = 151670400. Its totient is φ = 41095296.

The previous prime is 85720237. The next prime is 85720291. The reversal of 85720245 is 54202758.

It is not a de Polignac number, because 85720245 - 2³ = 85720237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430656 + ... + 430854.

It is an arithmetic number, because the mean of its divisors is an integer number (3159800).

Almost surely, 2^85720245 is an apocalyptic number.

It is an amenable number.

85720245 is a deficient number, since it is larger than the sum of its proper divisors (65950155).

85720245 is a wasteful number, since it uses less digits than its factorization.

85720245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 85720245 is about 9258.5228303439. The cubic root of 85720245 is about 440.9213561872.

The spelling of 85720245 in words is "eighty-five million, seven hundred twenty thousand, two hundred forty-five".