85286249 has 4 divisors (see below), whose sum is σ = 85329540. Its totient is φ = 85242960.

The previous prime is 85286213. The next prime is 85286251. The reversal of 85286249 is 94268258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13579225 + 71707024 = 3685^2 + 8468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85286249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85283249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18542 + ... + 22679.

It is an arithmetic number, because the mean of its divisors is an integer number (21332385).

Almost surely, 2^85286249 is an apocalyptic number.

It is an amenable number.

85286249 is a deficient number, since it is larger than the sum of its proper divisors (43291).

85286249 is a wasteful number, since it uses less digits than its factorization.

85286249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43290.

The product of its digits is 276480, while the sum is 44.

The square root of 85286249 is about 9235.0554410897. The cubic root of 85286249 is about 440.1759781618.

Subtracting 85286249 from its reverse (94268258), we obtain a square (8982009 = 2997²).

The spelling of 85286249 in words is "eighty-five million, two hundred eighty-six thousand, two hundred forty-nine".