247256 has 16 divisors (see below), whose sum is σ = 479040. Its totient is φ = 119520.

The previous prime is 247249. The next prime is 247259. The reversal of 247256 is 652742.

It is a super-2 number, since 2×247256² = 122271059072, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247256.

It is not an unprimeable number, because it can be changed into a prime (247259) by changing a digit.

247256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (29940).

2²⁴⁷²⁵⁶ is an apocalyptic number.

It is an amenable number.

247256 is a deficient number, since it is larger than the sum of its proper divisors (231784).

247256 is a wasteful number, since it uses less digits than its factorization.

247256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1030 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 247256 is about 497.2484288562. The cubic root of 247256 is about 62.7647225022.

Adding to 247256 its reverse (652742), we get a palindrome (899998).

The spelling of 247256 in words is "two hundred forty-seven thousand, two hundred fifty-six".