85280247 has 12 divisors (see below), whose sum is σ = 132658344. Its totient is φ = 52480080.

The previous prime is 85280207. The next prime is 85280323. The reversal of 85280247 is 74208258.

It is a happy number.

It is not a de Polignac number, because 85280247 - 2¹⁰ = 85279223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85280207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364329 + ... + 364562.

It is an arithmetic number, because the mean of its divisors is an integer number (11054862).

Almost surely, 2^85280247 is an apocalyptic number.

85280247 is a deficient number, since it is larger than the sum of its proper divisors (47378097).

85280247 is a wasteful number, since it uses less digits than its factorization.

85280247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728910 (or 728907 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 85280247 is about 9234.7304779295. The cubic root of 85280247 is about 440.1656521588.

The spelling of 85280247 in words is "eighty-five million, two hundred eighty thousand, two hundred forty-seven".