247285 has 12 divisors (see below), whose sum is σ = 315468. Its totient is φ = 186048.

The previous prime is 247279. The next prime is 247301. The reversal of 247285 is 582742.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 130321 = 342^2 + 361^2 .

It is not a de Polignac number, because 247285 - 2⁹ = 246773 is a prime.

It is a super-2 number, since 2×247285² = 122299742450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1737 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (26289).

2²⁴⁷²⁸⁵ is an apocalyptic number.

It is an amenable number.

247285 is a deficient number, since it is larger than the sum of its proper divisors (68183).

247285 is a wasteful number, since it uses less digits than its factorization.

247285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 161 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 247285 is about 497.2775884755. The cubic root of 247285 is about 62.7671762422.

The spelling of 247285 in words is "two hundred forty-seven thousand, two hundred eighty-five".