247564 has 12 divisors (see below), whose sum is σ = 441000. Its totient is φ = 121568.

The previous prime is 247553. The next prime is 247579. The reversal of 247564 is 465742.

247564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247564² = 122575868192, which contains 22 as substring.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289 + ... + 760.

It is an arithmetic number, because the mean of its divisors is an integer number (36750).

2²⁴⁷⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

247564 is a deficient number, since it is larger than the sum of its proper divisors (193436).

247564 is a wasteful number, since it uses less digits than its factorization.

247564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 247564 is about 497.5580368158. The cubic root of 247564 is about 62.7907731180.

The spelling of 247564 in words is "two hundred forty-seven thousand, five hundred sixty-four".